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878 lines
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878 lines
468 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H03K" definition-exists="true" date-revised="2022-01-01" status="published"><classification-symbol>H03K</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>PULSE TECHNIQUE </text><reference><text>measuring pulse characteristics <class-ref scheme="cpc">G01R</class-ref>; modulating sinusoidal oscillations with pulses <class-ref scheme="cpc">H03C</class-ref>; transmission of digital information <class-ref scheme="cpc">H04L</class-ref>; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation <class-ref scheme="cpc">H03D3/04</class-ref>; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified <class-ref scheme="cpc">H03L</class-ref>; coding, decoding or code conversion, in general <class-ref scheme="cpc">H03M</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subclass <u>covers</u>:<subnote type="bullet"><note-paragraph>methods, circuits, devices or apparatus using active elements operating in a discontinuous or switching manner for generating, counting, amplifying, shaping, modulating, demodulating or otherwise manipulating signals; </note-paragraph><note-paragraph>electronic switching not involving contact-making and braking; </note-paragraph><note-paragraph>logic circuits handling electric pulses.</note-paragraph></subnote></note-paragraph><note-paragraph>In this subclass, the following expression is used with the meaning indicated: <subnote type="bullet"><note-paragraph>"active element" exercises control over the conversion of input energy into an oscillation or a discontinuous flow of energy.</note-paragraph></subnote></note-paragraph><note-paragraph>In this subclass, where the claims of a patent document are not limited to a specific circuit element, the document is classified at least according to the elements used in the described embodiment.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">H03K17/695</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H03K17/687</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H03K3/00" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K3/00" definition-exists="true" ipc-concordant="H03K3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K3/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Circuits for generating electric pulses</text></title-part><title-part><text>Monostable, bistable or multistable circuits </text><reference><text><class-ref scheme="cpc">H03K4/00</class-ref> takes precedence; for digital function generators in computers <class-ref scheme="cpc">G06F1/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/01" definition-exists="false" ipc-concordant="H03K3/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/011" definition-exists="false" ipc-concordant="H03K3/011" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/011</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of generator to compensate for variations in physical values, e.g. voltage, temperature </text><CPC-specific-text><reference><text>to maintain energy constant <class-ref scheme="cpc">H03K3/015</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/012" definition-exists="false" ipc-concordant="H03K3/012" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of generator to improve response time or to decrease power consumption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/013" definition-exists="false" ipc-concordant="H03K3/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of generator to prevent operation by noise or interference</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/014" definition-exists="false" ipc-concordant="H03K3/014" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/014</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of generator to ensure starting of oscillations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/015" definition-exists="false" ipc-concordant="H03K3/015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of generator to maintain energy constant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/017" definition-exists="false" ipc-concordant="H03K3/017" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03K3/017</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Adjustment of width or dutycycle of pulses </text><reference><text>pulse width modulation <class-ref scheme="cpc">H03K7/08</class-ref> </text><CPC-specific-text><text>; to maintain energy constant <class-ref scheme="cpc">H03K3/015</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/02" definition-exists="false" ipc-concordant="H03K3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K3/02</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Generators characterised by the type of circuit or by the means used for producing pulses </text><reference><text><class-ref scheme="cpc">H03K3/64</class-ref> - <class-ref scheme="cpc">H03K3/84</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/021" definition-exists="false" ipc-concordant="H03K3/021" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of more than one type of element or means, e.g. BIMOS, composite devices such as IGBT</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/023" definition-exists="false" ipc-concordant="H03K3/023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of differential amplifiers or comparators, with internal or external positive feedback</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/0231" definition-exists="false" ipc-concordant="H03K3/0231" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0231</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Astable circuits </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K3/0315</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/02315" definition-exists="false" ipc-concordant="H03K3/0231" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/02315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stabilisation of output, e.g. using crystal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/0232" definition-exists="false" ipc-concordant="H03K3/0232" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0232</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monostable circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/0233" definition-exists="false" ipc-concordant="H03K3/0233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0233</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistable circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/02332" definition-exists="false" ipc-concordant="H03K3/0233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/02332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the master-slave type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/02335" definition-exists="false" ipc-concordant="H03K3/0233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/02335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with means for increasing reliability; for protection; for ensuring a predetermined initial state when the supply voltage has been applied; for storing the actual state when the supply voltage fails </text><reference><text>digital storage cells each combining volatile and non-volatile storage properties <class-ref scheme="cpc">G11C14/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/02337" definition-exists="false" ipc-concordant="H03K3/0233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/02337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistables with hysteresis, e.g. Schmitt trigger </text><reference><text>non-regenerative amplitude discriminators <class-ref scheme="cpc">G01R19/165</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/0234" definition-exists="false" ipc-concordant="H03K3/0234" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0234</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multistable circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/027" definition-exists="false" ipc-concordant="H03K3/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of logic circuits, with internal or external positive feedback</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/03" definition-exists="false" ipc-concordant="H03K3/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Astable circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/0307" definition-exists="false" ipc-concordant="H03K3/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stabilisation of output, e.g. using crystal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/0315" definition-exists="false" ipc-concordant="H03K3/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring oscillators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/0322" definition-exists="false" ipc-concordant="H03K3/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with differential cells</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/033" definition-exists="false" ipc-concordant="H03K3/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monostable circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/037" definition-exists="false" ipc-concordant="H03K3/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistable circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/0372" definition-exists="false" ipc-concordant="H03K3/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0372</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the master-slave type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/0375" definition-exists="false" ipc-concordant="H03K3/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with means for increasing reliability; for protection; for ensuring a predetermined initial state when the supply voltage has been applied; for storing the actual state when the supply voltage fails </text><reference><text>digital storage cells each combining volatile and non-volatile storage properties <class-ref scheme="cpc">G11C14/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/0377" definition-exists="false" ipc-concordant="H03K3/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/0377</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistables with hysteresis, e.g. Schmitt trigger </text><reference><text>non-regenerative amplitude discriminators <class-ref scheme="cpc">G01R19/165</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/038" definition-exists="false" ipc-concordant="H03K3/038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multistable circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/04" definition-exists="false" ipc-concordant="H03K3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of vacuum tubes only, with positive feedback </text><reference><text><class-ref scheme="cpc">H03K3/023</class-ref>, <class-ref scheme="cpc">H03K3/027</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/05" definition-exists="false" ipc-concordant="H03K3/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using means other than a transformer for feedback</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/06" definition-exists="false" ipc-concordant="H03K3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/08" definition-exists="false" ipc-concordant="H03K3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>astable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/09" definition-exists="false" ipc-concordant="H03K3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stabilisation of output</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/10" definition-exists="false" ipc-concordant="H03K3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>monostable</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/12" definition-exists="false" ipc-concordant="H03K3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>bistable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/13" definition-exists="false" ipc-concordant="H03K3/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistables with hysteresis, e.g. Schmitt trigger</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/14" definition-exists="false" ipc-concordant="H03K3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>multistable</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/16" definition-exists="false" ipc-concordant="H03K3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a transformer for feedback, e.g. blocking oscillator with saturable core</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/22" definition-exists="false" ipc-concordant="H03K3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for amplitude comparison, i.e. Multiar</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/26" definition-exists="false" ipc-concordant="H03K3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of bipolar transistors with internal or external positive feedback </text><reference><text><class-ref scheme="cpc">H03K3/023</class-ref>, <class-ref scheme="cpc">H03K3/027</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/28" definition-exists="false" ipc-concordant="H03K3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using means other than a transformer for feedback</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/281" definition-exists="false" ipc-concordant="H03K3/281" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/282" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>astable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/2821" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emitters connected to one another by using a capacitor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/2823" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two active transistor of the same conductivity type </text><reference><text><class-ref scheme="cpc">H03K3/2821</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/2825" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an asymmetrical circuit configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/2826" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two active transistors of the complementary type </text><reference><text><class-ref scheme="cpc">H03K3/2821</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/2828" definition-exists="false" ipc-concordant="H03K3/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an asymmetrical circuit configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/283" definition-exists="false" ipc-concordant="H03K3/283" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H03K3/283</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Stabilisation of output </text><CPC-specific-text><text>, e.g. using crystal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/284" definition-exists="false" ipc-concordant="H03K3/284" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>monostable</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/286" definition-exists="false" ipc-concordant="H03K3/286" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>bistable</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/2865" definition-exists="false" ipc-concordant="H03K3/286" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ensuring a predetermined initial state when the supply voltage has been applied; storing the actual state when the supply voltage fails </text><reference><text>digital storage cells each combining volatile and non-volatile storage properties <class-ref scheme="cpc">G11C14/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/287" definition-exists="false" ipc-concordant="H03K3/287" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using additional transistors in the feedback circuit </text><reference><text><class-ref scheme="cpc">H03K3/289</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/288" definition-exists="false" ipc-concordant="H03K3/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using additional transistors in the input circuit </text><reference><text><class-ref scheme="cpc">H03K3/289</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/2885" definition-exists="false" ipc-concordant="H03K3/2885" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2885</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the input circuit having a differential configuration</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/289" definition-exists="false" ipc-concordant="H03K3/289" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/289</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the master-slave type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/2893" definition-exists="false" ipc-concordant="H03K3/2893" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2893</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistables with hysteresis, e.g. Schmitt trigger</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/2897" definition-exists="false" ipc-concordant="H03K3/2897" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/2897</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an input circuit of differential configuration</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/29" definition-exists="false" ipc-concordant="H03K3/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/29</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>multistable</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/30" definition-exists="false" ipc-concordant="H03K3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a transformer for feedback, e.g. blocking oscillator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/313" definition-exists="false" ipc-concordant="H03K3/313" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/313</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/315" definition-exists="false" ipc-concordant="H03K3/315" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/315</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being tunnel diodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/33" definition-exists="false" ipc-concordant="H03K3/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of semiconductor devices exhibiting hole storage or enhancement effect</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/335" definition-exists="false" ipc-concordant="H03K3/335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of semiconductor devices with more than two electrodes and exhibiting avalanche effect</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/35" definition-exists="false" ipc-concordant="H03K3/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K3/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region </text><reference><text><class-ref scheme="cpc">H03K3/023</class-ref>, <class-ref scheme="cpc">H03K3/027</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/351" definition-exists="false" ipc-concordant="H03K3/351" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/351</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being unijunction transistors </text><reference><text><class-ref scheme="cpc">H03K3/352</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/352" definition-exists="false" ipc-concordant="H03K3/352" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being thyristors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/3525" definition-exists="false" ipc-concordant="H03K3/3525" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/3525</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode gate thyristors or programmable unijunction transistors</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/353" definition-exists="false" ipc-concordant="H03K3/353" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/353</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of field-effect transistors with internal or external positive feedback </text><reference><text><class-ref scheme="cpc">H03K3/023</class-ref>, <class-ref scheme="cpc">H03K3/027</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/354" definition-exists="false" ipc-concordant="H03K3/354" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/354</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Astable circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/3545" definition-exists="false" ipc-concordant="H03K3/354" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/3545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stabilisation of output, e.g. using crystal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/355" definition-exists="false" ipc-concordant="H03K3/355" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/355</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monostable circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/356" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistable circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/356008" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ensuring a predetermined initial state when the supply voltage has been applied; storing the actual state when the supply voltage fails </text><reference><text>digital storage cells each combining volatile and non-volatile storage properties <class-ref scheme="cpc">G11C14/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/356017" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using additional transistors in the input circuit </text><reference><text><class-ref scheme="cpc">H03K3/356104</class-ref>, <class-ref scheme="cpc">H03K3/3562</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356026" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation </text><reference><text><class-ref scheme="cpc">H03K3/356034</class-ref>, <class-ref scheme="cpc">H03K3/356052</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356034" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the input circuit having a differential configuration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/356043" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356052" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pass gates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/35606" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/35606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/356069" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using additional transistors in the feedback circuit </text><reference><text><class-ref scheme="cpc">H03K3/356104</class-ref>, <class-ref scheme="cpc">H03K3/3562</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356078" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/356086" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with additional means for controlling the main nodes </text><reference><text><class-ref scheme="cpc">H03K3/356104</class-ref>, <class-ref scheme="cpc">H03K3/3562</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356095" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/356104" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K3/356104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using complementary field-effect transistors </text><reference><text><class-ref scheme="cpc">H03K3/35625</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356113" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356113</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using additional transistors in the input circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/356121" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation </text><reference><text><class-ref scheme="cpc">H03K3/35613</class-ref>, <class-ref scheme="cpc">H03K3/356147</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/35613" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/35613</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the input circuit having a differential configuration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/356139" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356139</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/356147" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pass gates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K3/356156" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356156</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356165" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using additional transistors in the feedback circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/356173" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/356182" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with additional means for controlling the main nodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K3/356191" definition-exists="false" ipc-concordant="H03K3/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/356191</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/3562" definition-exists="false" ipc-concordant="H03K3/3562" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/3562</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the master-slave type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K3/35625" definition-exists="false" ipc-concordant="H03K3/3562" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/35625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using complementary field-effect transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K3/3565" definition-exists="false" ipc-concordant="H03K3/3565" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/3565</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bistables with hysteresis, e.g. Schmitt trigger</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/3568" definition-exists="false" ipc-concordant="H03K3/3568" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/3568</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multistable circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/357" definition-exists="false" ipc-concordant="H03K3/357" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/357</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of bulk negative resistance devices, e.g. Gunn-effect devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/36" definition-exists="false" ipc-concordant="H03K3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of semiconductors, not otherwise provided for</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/37" definition-exists="false" ipc-concordant="H03K3/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of gas-filled tubes, e.g. astable trigger circuits </text><reference><text><class-ref scheme="cpc">H03K3/55</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/38" definition-exists="false" ipc-concordant="H03K3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of superconductive devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/40" definition-exists="false" ipc-concordant="H03K3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of electrochemical cells</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/42" definition-exists="false" ipc-concordant="H03K3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/43" definition-exists="false" ipc-concordant="H03K3/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of beam deflection tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/45" definition-exists="false" ipc-concordant="H03K3/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/45</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use, as active elements, of non-linear magnetic or dielectric devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/455" definition-exists="false" ipc-concordant="H03K3/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thin films</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/47" definition-exists="false" ipc-concordant="H03K3/47" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/47</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being parametrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/49" definition-exists="false" ipc-concordant="H03K3/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being ferro-resonant</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/51" definition-exists="false" ipc-concordant="H03K3/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the devices being multi-aperture magnetic cores, e.g. transfluxors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/53" definition-exists="true" ipc-concordant="H03K3/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K3/53</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback </text><reference><text><class-ref scheme="cpc">H03K3/335</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/537" definition-exists="false" ipc-concordant="H03K3/537" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/537</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the switching device being a spark gap</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/543" definition-exists="false" ipc-concordant="H03K3/543" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/543</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the switching device being a vacuum tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/55" definition-exists="false" ipc-concordant="H03K3/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the switching device being a gas-filled tube having a control electrode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/57" definition-exists="false" ipc-concordant="H03K3/57" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/57</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the switching device being a semiconductor device</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/59" definition-exists="false" ipc-concordant="H03K3/59" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/59</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of galvano-magnetic devices, e.g. Hall effect devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/64" definition-exists="false" ipc-concordant="H03K3/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generators producing trains of pulses, i.e. finite sequences of pulses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/66" definition-exists="false" ipc-concordant="H03K3/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by interrupting the output of a generator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K3/70" definition-exists="false" ipc-concordant="H03K3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>time intervals between all adjacent pulses of one train being equal</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K3/72" definition-exists="false" ipc-concordant="H03K3/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for varying repetition rate of trains</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/78" definition-exists="false" ipc-concordant="H03K3/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/80" definition-exists="false" ipc-concordant="H03K3/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K3/80</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Generating trains of sinusoidal oscillations </text><reference><text>by keying or interruption of sinusoidal oscillations <class-ref scheme="cpc">H03C</class-ref>; for transmission of digital information <class-ref scheme="cpc">H04L</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/84" definition-exists="false" ipc-concordant="H03K3/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K3/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K3/86" definition-exists="false" ipc-concordant="H03K3/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03K3/86</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Generating pulses by means of delay lines and not covered by the preceding subgroups</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K4/00" definition-exists="true" ipc-concordant="H03K4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K4/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Generating pulses having essentially a finite slope or stepped portions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K4/02" definition-exists="false" ipc-concordant="H03K4/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having stepped portions, e.g. staircase waveform</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K4/023" definition-exists="false" ipc-concordant="H03K4/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by repetitive charge or discharge of a capacitor, analogue generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K4/026" definition-exists="false" ipc-concordant="H03K4/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K4/04" definition-exists="false" ipc-concordant="H03K4/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having parabolic shape</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K4/06" definition-exists="false" ipc-concordant="H03K4/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having triangular shape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K4/063" definition-exists="false" ipc-concordant="H03K4/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>high voltage - or current generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K4/066" definition-exists="false" ipc-concordant="H03K4/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a Miller-integrator </text><reference><text><class-ref scheme="cpc">H03K4/08</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K4/08" definition-exists="false" ipc-concordant="H03K4/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having sawtooth shape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/085" definition-exists="false" ipc-concordant="H03K4/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection of sawtooth generators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/10" definition-exists="false" ipc-concordant="H03K4/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements vacuum tubes only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/12" definition-exists="false" ipc-concordant="H03K4/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a sawtooth voltage is produced across a capacitor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/14" definition-exists="true" ipc-concordant="H03K4/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K4/14</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using two tubes so coupled that the input of each one is derived from the output of the other, e.g. multivibrator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/16" definition-exists="true" ipc-concordant="H03K4/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K4/16</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using a single tube with positive feedback through transformer, e.g. blocking oscillator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/18" definition-exists="false" ipc-concordant="H03K4/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/20" definition-exists="false" ipc-concordant="H03K4/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a tube with negative feedback by capacitor, e.g. Miller integrator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/22" definition-exists="false" ipc-concordant="H03K4/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with transitron, e.g. phantastron, sanatron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/24" definition-exists="false" ipc-concordant="H03K4/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boot-strap generators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/26" definition-exists="false" ipc-concordant="H03K4/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a sawtooth current is produced through an inductor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/28" definition-exists="false" ipc-concordant="H03K4/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a tube operating as a switching device</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/32" definition-exists="false" ipc-concordant="H03K4/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with means for generating the driving pulses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K4/34" definition-exists="false" ipc-concordant="H03K4/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single tube with positive feedback through a transformer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K4/36" definition-exists="false" ipc-concordant="H03K4/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H03K4/38" definition-exists="false" ipc-concordant="H03K4/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with Miller integrator</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/39" definition-exists="false" ipc-concordant="H03K4/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a tube operating as an amplifier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/41" definition-exists="false" ipc-concordant="H03K4/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with negative feedback through a capacitor, e.g. Miller-integrator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/43" definition-exists="false" ipc-concordant="H03K4/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with means for generating the driving pulses</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/48" definition-exists="false" ipc-concordant="H03K4/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K4/48</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using as active elements semiconductor devices </text><reference><text><class-ref scheme="cpc">H03K4/787</class-ref> - <class-ref scheme="cpc">H03K4/84</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/50" definition-exists="false" ipc-concordant="H03K4/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a sawtooth voltage is produced across a capacitor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/501" definition-exists="false" ipc-concordant="H03K4/501" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/501</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/502" definition-exists="false" ipc-concordant="H03K4/502" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the capacitor being charged from a constant-current source</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/52" definition-exists="true" ipc-concordant="H03K4/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K4/52</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using two semiconductor devices so coupled that the input of each one is derived from the output of the other, e.g. multivibrator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/54" definition-exists="true" ipc-concordant="H03K4/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K4/54</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using a single semiconductor device with positive feedback through a transformer, e.g. blocking oscillator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/56" definition-exists="false" ipc-concordant="H03K4/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a semiconductor device with negative feedback through a capacitor, e.g. Miller integrator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/58" definition-exists="false" ipc-concordant="H03K4/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boot-strap generators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/60" definition-exists="false" ipc-concordant="H03K4/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a sawtooth current is produced through an inductor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/62" definition-exists="false" ipc-concordant="H03K4/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a semiconductor device operating as a switching device</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/625" definition-exists="false" ipc-concordant="H03K4/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse-modulation techniques for the generation of the sawtooth wave, e.g. class D, switched mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/64" definition-exists="false" ipc-concordant="H03K4/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with means for generating the driving pulses </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K4/625</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K4/66" definition-exists="false" ipc-concordant="H03K4/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single device with positive feedback, e.g. blocking oscillator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/68" definition-exists="false" ipc-concordant="H03K4/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generators in which the switching device is conducting during the fly-back part of the cycle</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K4/69" definition-exists="false" ipc-concordant="H03K4/69" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/69</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a semiconductor device operating as an amplifier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/693" definition-exists="false" ipc-concordant="H03K4/69" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/693</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating in push-pull, e.g. class B </text><reference><text><class-ref scheme="cpc">H03K4/696</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/696" definition-exists="false" ipc-concordant="H03K4/69" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/696</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using means for reducing power dissipation or for shortening the flyback time, e.g. applying a higher voltage during flyback time</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/71" definition-exists="false" ipc-concordant="H03K4/71" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/71</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with negative feedback through a capacitor, e.g. Miller-integrator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K4/72" definition-exists="false" ipc-concordant="H03K4/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with means for generating the driving pulses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K4/725" definition-exists="false" ipc-concordant="H03K4/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Push-pull amplifier circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/787" definition-exists="false" ipc-concordant="H03K4/787" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/787</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements semiconductor devices with two electrodes and exhibiting a negative resistance characteristic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/793" definition-exists="false" ipc-concordant="H03K4/793" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/793</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tunnel diodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/80" definition-exists="false" ipc-concordant="H03K4/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements multi-layer diodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/83" definition-exists="false" ipc-concordant="H03K4/83" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/83</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements semiconductor devices with more than two PN junctions or with more than three electrodes or more than one electrode connected to the same conductivity region</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/835" definition-exists="false" ipc-concordant="H03K4/83" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse-modulation techniques for the generation of the sawtooth wave, e.g. class D, switched mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K4/84" definition-exists="false" ipc-concordant="H03K4/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generators in which the semiconductor device is conducting during the fly-back part of the cycle </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K4/835</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/86" definition-exists="false" ipc-concordant="H03K4/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements gas-filled tubes </text><CPC-specific-text><text>or spark-gaps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/88" definition-exists="false" ipc-concordant="H03K4/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using as active elements electrochemical cells </text><CPC-specific-text><text>or galvano-magnetic or photo-electric elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K4/90" definition-exists="true" ipc-concordant="H03K4/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K4/90</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Linearisation of ramp </text><reference><text>modifying slopes of pulses <class-ref scheme="cpc">H03K6/04</class-ref>; scanning distortion correction for television receivers <class-ref scheme="cpc">H04N3/23</class-ref></text></reference></title-part><title-part><text>Synchronisation of pulses</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K4/92" definition-exists="false" ipc-concordant="H03K4/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a waveform comprising a portion of a sinusoid </text><reference><text>generating sinusoidal oscillations <class-ref scheme="cpc">H03B</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K4/94" definition-exists="false" ipc-concordant="H03K4/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K4/94</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having trapezoidal shape</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K5/00" definition-exists="true" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K5/00</classification-symbol><class-title date-revised="2020-01-01"> <title-part><text>Manipulating of pulses not covered by one of the other main groups of this subclass </text><reference><text>circuits with regenerative action <class-ref scheme="cpc">H03K3/00</class-ref>, <class-ref scheme="cpc">H03K4/00</class-ref>; by the use of non-linear magnetic or dielectric devices <class-ref scheme="cpc">H03K3/45</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this group, the input signals are of the pulse type.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/00006" definition-exists="true" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K5/00006</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Changing the frequency </text><reference><text>modulating pulses <class-ref scheme="cpc">H03K7/00</class-ref>; frequency dividers <class-ref scheme="cpc">H03K21/00</class-ref> - <class-ref scheme="cpc">H03K29/00</class-ref>; additive or subtractive mixing of two pulse rates into one <class-ref scheme="cpc">G06F7/605</class-ref>; pulse rate dividers <class-ref scheme="cpc">G06F7/68</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K5/00013" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay, i.e. output pulse is delayed after input pulse and pulse length of output pulse is dependent on pulse length of input pulse</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K5/00019" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable delay</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00026" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by an analog electrical signal, e.g. obtained after conversion by a D/A converter</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00032" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dc control of switching transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K5/00039" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having four transistors serially</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00045" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dc voltage control of a capacitor or of the coupling of a capacitor as a load</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00052" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by mixing the outputs of fixed delayed signals with each other or with the input signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00058" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by a digital setting</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00065" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by current control, e.g. by parallel current control transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00071" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adding capacitance as a load</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K5/00078" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixed delay</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00084" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by trimming or adjusting the delay</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00091" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fuse links</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00097" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding variations of delay using feedback, e.g. controlled by a PLL</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00104" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a reference signal, e.g. a reference clock</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/0011" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a separate time interval to calibrate the delay</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00117" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00117</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding variations of delay due to line termination</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00123" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding variations of delay due to integration tolerances</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/0013" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding variations of delay due to power supply</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00136" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding asymmetry of delay for leading or trailing edge; Avoiding variations of delay due to threshold</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00143" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Avoiding variations of delay due to temperature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K5/0015" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Layout of the delay element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00156" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00156</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using opamps, comparators, voltage multipliers or other analog building blocks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00163" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bipolar transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00169" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00176" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using differential stages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00182" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using constant current sources</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00189" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in BiCMOS technology</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00195" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using FET's</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00202" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00208" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using differential stages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00215" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the conduction path of multiple FET's is in parallel or in series, all having the same gate control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00221" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the conduction path of the different output FET's is connected in parallel with different gate control, e.g. having different sizes or thresholds, or coupled through different resistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00228" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having complementary input and output signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/00234" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using circuits having two logic levels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00241" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using shift registers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00247" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using counters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00254" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using microprocessors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/0026" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using memories or FIFO's</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00267" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using D/A or A/D converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K5/00273" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital comparators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K5/0028" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using varicaps, e.g. gate capacity of a FET with specially defined threshold, as delaying capacitors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K5/00286" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Phase shifter, i.e. the delay between the output and input pulse is dependent on the frequency, and such that a phase difference is obtained independent of the frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K5/00293" definition-exists="false" ipc-concordant="H03K5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2005/00293</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Output pulse is a delayed pulse issued after a rising or a falling edge, the length of the output pulse not being in relation with the length of the input triggering pulse</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/003" definition-exists="true" ipc-concordant="H03K5/003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K5/003</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Changing the DC level </text><reference><text>reinsertion of dc component of a television signal <class-ref scheme="cpc">H04N5/16</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/007" definition-exists="false" ipc-concordant="H03K5/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Base line stabilisation </text><reference><text>thresholding <class-ref scheme="cpc">H03K5/08</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/01" definition-exists="true" ipc-concordant="H03K5/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shaping pulses </text><reference><text>discrimination against noise or interference <class-ref scheme="cpc">H03K5/125</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/02" definition-exists="true" ipc-concordant="H03K5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K5/02</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by amplifying </text><reference><text><class-ref scheme="cpc">H03K5/04</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/023" definition-exists="false" ipc-concordant="H03K5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field effect transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/026" definition-exists="false" ipc-concordant="H03K5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a bidirectional operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/04" definition-exists="true" ipc-concordant="H03K5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by increasing duration</text></title-part><title-part><text>by decreasing duration</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/05" definition-exists="false" ipc-concordant="H03K5/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of clock signals or other time reference signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/06" definition-exists="true" ipc-concordant="H03K5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of delay lines or other analogue delay elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/065" definition-exists="true" ipc-concordant="H03K5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using dispersive delay lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/07" definition-exists="false" ipc-concordant="H03K5/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of resonant circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/08" definition-exists="true" ipc-concordant="H03K5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by limiting</text></title-part><title-part><text>by thresholding</text></title-part><title-part><text>by slicing, i.e. combined limiting and thresholding </text><reference><text><class-ref scheme="cpc">H03K5/07</class-ref> takes precedence; comparing one pulse with another <class-ref scheme="cpc">H03K5/22</class-ref>; providing a determined threshold for switching <class-ref scheme="cpc">H03K17/30</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/082" definition-exists="false" ipc-concordant="H03K5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an adaptive threshold</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/084" definition-exists="true" ipc-concordant="H03K5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modified by switching, e.g. by a periodic signal or by a signal in synchronism with the transitions of the output signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/086" definition-exists="true" ipc-concordant="H03K5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>generated by feedback</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K5/088" definition-exists="true" ipc-concordant="H03K5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modified by switching, e.g. by a periodic signal or by a signal in synchronism with the transitions of the output signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/12" definition-exists="true" ipc-concordant="H03K5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by steepening leading or trailing edges</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/125" definition-exists="true" ipc-concordant="H03K5/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K5/125</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Discriminating pulses </text><reference><text>measuring characteristics of individual pulses <class-ref scheme="cpc">G01R29/02</class-ref>; separation of synchronising signals in television systems <class-ref scheme="cpc">H04N5/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/1252" definition-exists="true" ipc-concordant="H03K5/1252" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1252</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Suppression or limitation of noise or interference </text><reference><text>specially adapted for transmission systems <class-ref scheme="cpc">H04B15/00</class-ref>, <class-ref scheme="cpc">H04L25/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/1254" definition-exists="false" ipc-concordant="H03K5/1254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1254</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for pulses generated by closure of switches, i.e. anti-bouncing devices </text><reference><text>debouncing circuits for electronic time-pieces <class-ref scheme="cpc">G04G5/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/13" definition-exists="true" ipc-concordant="H03K5/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K5/13</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/131" definition-exists="true" ipc-concordant="H03K5/131" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>H03K5/131</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digitally controlled</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/133" definition-exists="false" ipc-concordant="H03K5/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>H03K5/133</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a chain of active delay devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/134" definition-exists="false" ipc-concordant="H03K5/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-07-01" status="published"><classification-symbol>H03K5/134</classification-symbol><class-title><title-part><text>with field-effect transistors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/135" definition-exists="true" ipc-concordant="H03K5/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of time reference signals, e.g. clock signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/14" definition-exists="false" ipc-concordant="H03K5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-07-01" status="published"><classification-symbol>H03K5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of delay lines </text><reference><text><class-ref scheme="cpc">H03K5/133</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/145" definition-exists="false" ipc-concordant="H03K5/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of resonant circuits</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/15" definition-exists="true" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors </text><reference><text>distributing, switching or gating arrangements <class-ref scheme="cpc">H03K17/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/15006" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two programmable outputs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/15013" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than two outputs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/1502" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>programmable</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/15026" definition-exists="true" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with asynchronously driven series connected output stages</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15033" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a chain of bistable devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/1504" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a chain of active delay devices </text><reference><text><class-ref scheme="cpc">H03K5/15053</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15046" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a tapped delay line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15053" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a chain of monostable devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/1506" definition-exists="true" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with parallel driven output stages; with synchronously driven series connected output stages</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15066" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bistable devices </text><reference><text><class-ref scheme="cpc">H03K5/15093</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15073" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of comparators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/1508" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of delay lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15086" definition-exists="false" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of monostables devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/15093" definition-exists="true" ipc-concordant="H03K5/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/15093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using devices arranged in a shift register</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/151" definition-exists="true" ipc-concordant="H03K5/151" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/151</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with two complementary outputs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/1515" definition-exists="true" ipc-concordant="H03K5/151" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>non-overlapping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/153" definition-exists="true" ipc-concordant="H03K5/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K5/153</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant </text><reference><text>switching at zero crossing <class-ref scheme="cpc">H03K17/13</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/1532" definition-exists="true" ipc-concordant="H03K5/1532" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K5/1532</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Peak detectors </text><reference><text>measuring characteristics of individual pulses <class-ref scheme="cpc">G01R29/02</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/1534" definition-exists="false" ipc-concordant="H03K5/1534" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1534</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transition or edge detectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/1536" definition-exists="false" ipc-concordant="H03K5/1536" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1536</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Zero-crossing detectors </text><reference><text>in measuring circuits <class-ref scheme="cpc">G01R19/175</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/156" definition-exists="false" ipc-concordant="H03K5/156" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/156</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements in which a continuous pulse train is transformed into a train having a desired pattern</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/1565" definition-exists="true" ipc-concordant="H03K5/156" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/1565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the output pulses having a constant duty cycle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/159" definition-exists="true" ipc-concordant="H03K5/159" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/159</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Applications of delay lines not covered by the preceding subgroups</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/19" definition-exists="true" ipc-concordant="H03K5/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring patterns of pulse trains </text><reference><text>indicating amplitude <class-ref scheme="cpc">G01R19/00</class-ref>; indicating frequency <class-ref scheme="cpc">G01R23/00</class-ref>; measuring characteristics of individual pulses <class-ref scheme="cpc">G01R29/02</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K5/22" definition-exists="false" ipc-concordant="H03K5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral </text><reference><text>indicating phase difference of two cyclic pulse trains <class-ref scheme="cpc">G01R25/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/24" definition-exists="true" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the characteristic being amplitude</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/2409" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bipolar transistors </text><reference><text><class-ref scheme="cpc">H03K5/2436</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/2418" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/2427" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using clock signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/2436" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of bipolar and field-effect transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/2445" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/2454" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using clock signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/2463" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using diodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K5/2472" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field effect transistors </text><reference><text><class-ref scheme="cpc">H03K5/2436</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/2481" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/2481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K5/249" definition-exists="false" ipc-concordant="H03K5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using clock signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K5/26" definition-exists="false" ipc-concordant="H03K5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the characteristic being duration, interval, position, frequency, or sequence</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K6/00" definition-exists="true" ipc-concordant="H03K6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K6/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass </text><reference><text>circuits with regenerative action <class-ref scheme="cpc">H03K4/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K6/02" definition-exists="true" ipc-concordant="H03K6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K6/02</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Amplifying pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K6/04" definition-exists="true" ipc-concordant="H03K6/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K6/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Modifying slopes of pulses, e.g. S-correction </text><reference><text>S-correction in television <class-ref scheme="cpc">H04N3/23</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K7/00" definition-exists="true" ipc-concordant="H03K7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modulating pulses with a continuously-variable modulating signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K7/02" definition-exists="false" ipc-concordant="H03K7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude modulation, i.e. PAM</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K7/04" definition-exists="true" ipc-concordant="H03K7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position modulation, i.e. PPM</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K7/06" definition-exists="true" ipc-concordant="H03K7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency or rate modulation, i.e. PFM or PRM</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K7/08" definition-exists="true" ipc-concordant="H03K7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Duration or width modulation </text><CPC-specific-text><text>Duty cycle modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K7/10" definition-exists="false" ipc-concordant="H03K7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combined modulation, e.g. rate modulation and amplitude modulation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K9/00" definition-exists="true" ipc-concordant="H03K9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Demodulating pulses which have been modulated with a continuously-variable signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K9/02" definition-exists="false" ipc-concordant="H03K9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of amplitude-modulated pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K9/04" definition-exists="false" ipc-concordant="H03K9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of position-modulated pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K9/06" definition-exists="false" ipc-concordant="H03K9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of frequency- or rate-modulated pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K9/08" definition-exists="false" ipc-concordant="H03K9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of duration- or width-mudulated pulses </text><CPC-specific-text><text>or of duty-cycle modulated pulses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K9/10" definition-exists="false" ipc-concordant="H03K9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of pulses having combined modulation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K11/00" definition-exists="false" ipc-concordant="H03K11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transforming types of modulations, e.g. position-modulated pulses into duration-modulated pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/007" definition-exists="false" ipc-concordant="H03K17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several outputs only</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0424" definition-exists="false" ipc-concordant="H03K17/0424" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0424</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by the use of a transformer</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/063" definition-exists="false" ipc-concordant="H03K17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/066" definition-exists="false" ipc-concordant="H03K17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Maximizing the OFF-resistance instead of minimizing the ON-resistance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/08" definition-exists="true" ipc-concordant="H03K17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for protecting switching circuit against overcurrent or overvoltage</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/0803" definition-exists="false" ipc-concordant="H03K17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/0803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>against radiation hardening</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/0806" definition-exists="false" ipc-concordant="H03K17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/0806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>against excessive temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/081" definition-exists="false" ipc-concordant="H03K17/081" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without feedback from the output circuit to the control circuit</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/08112" definition-exists="false" ipc-concordant="H03K17/081" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/08112</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in bipolar transistor switches </text><reference><text><class-ref scheme="cpc">H03K17/0812</class-ref>, <class-ref scheme="cpc">H03K17/0814</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/08116" definition-exists="false" ipc-concordant="H03K17/081" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/08116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches </text><reference><text><class-ref scheme="cpc">H03K17/0812</class-ref>, <class-ref scheme="cpc">H03K17/0814</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0812" definition-exists="true" ipc-concordant="H03K17/0812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0812</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by measures taken in the control circuit</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/08126" definition-exists="false" ipc-concordant="H03K17/0812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/08126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in bipolar transitor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/08128" definition-exists="false" ipc-concordant="H03K17/0812" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/08128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0822" definition-exists="false" ipc-concordant="H03K17/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0824" definition-exists="false" ipc-concordant="H03K17/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in thyristor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0826" definition-exists="false" ipc-concordant="H03K17/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in bipolar transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/0828" definition-exists="false" ipc-concordant="H03K17/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/0828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/10" definition-exists="true" ipc-concordant="H03K17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for increasing the maximum permissible switched voltage</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/102" definition-exists="false" ipc-concordant="H03K17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/105" definition-exists="false" ipc-concordant="H03K17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in thyristor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/107" definition-exists="false" ipc-concordant="H03K17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/12" definition-exists="true" ipc-concordant="H03K17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for increasing the maximum permissible switched current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/122" definition-exists="false" ipc-concordant="H03K17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/125" definition-exists="false" ipc-concordant="H03K17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in thyristor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/127" definition-exists="false" ipc-concordant="H03K17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/13" definition-exists="true" ipc-concordant="H03K17/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/13</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Modifications for switching at zero crossing </text><reference><text>generating an impulse at zero crossing <class-ref scheme="cpc">H03K5/1536</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/133" definition-exists="false" ipc-concordant="H03K17/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/136" definition-exists="false" ipc-concordant="H03K17/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in thyristor switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/14" definition-exists="false" ipc-concordant="H03K17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for compensating variations of physical values, e.g. of temperature</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/145" definition-exists="false" ipc-concordant="H03K17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/16" definition-exists="true" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for eliminating interference voltages or currents</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/161" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/162" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>without feedback from the output circuit to the control circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/163" definition-exists="true" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Soft switching</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/164" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using parallel switching arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/165" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by feedback from the output circuit to the control circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/166" definition-exists="true" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Soft switching</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/167" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using parallel switching arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/168" definition-exists="false" ipc-concordant="H03K17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in composite switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/18" definition-exists="true" ipc-concordant="H03K17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for indicating state of switch</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/20" definition-exists="false" ipc-concordant="H03K17/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for resetting core switching units to a predetermined state</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/22" definition-exists="true" ipc-concordant="H03K17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for ensuring a predetermined initial state when the supply voltage has been applied </text><reference><text>bi-stable generators <class-ref scheme="cpc">H03K3/12</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/223" definition-exists="false" ipc-concordant="H03K17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/226" definition-exists="false" ipc-concordant="H03K17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in bipolar transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/24" definition-exists="true" ipc-concordant="H03K17/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Storing the actual state when the supply voltage fails</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/26" definition-exists="false" ipc-concordant="H03K17/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications for temporary blocking after receipt of control pulses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/28" definition-exists="false" ipc-concordant="H03K17/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Modifications for introducing a time delay before switching </text><reference><text>modifications to provide a choice of time-intervals for executing more than one switching action <class-ref scheme="cpc">H03K17/296</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/284" definition-exists="false" ipc-concordant="H03K17/284" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in field effect transistor switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/288" definition-exists="false" ipc-concordant="H03K17/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in tube switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/292" definition-exists="false" ipc-concordant="H03K17/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/292</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in thyristor, unijunction transistor or programmable unijunction transistor switches</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/296" definition-exists="true" ipc-concordant="H03K17/296" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/296</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-programme switches providing a choice of time-intervals for executing more than one switching action and automatically terminating their operation after the programme is completed </text><reference><text>electronic clocks comprising means to be operated at preselected times or after preselected time-intervals <class-ref scheme="cpc">G04G15/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/30" definition-exists="true" ipc-concordant="H03K17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K17/30</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Modifications for providing a predetermined threshold before switching </text><reference><text>shaping pulses by thresholding <class-ref scheme="cpc">H03K5/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/302" definition-exists="false" ipc-concordant="H03K17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in field-effect transistor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/305" definition-exists="false" ipc-concordant="H03K17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in thyristor switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/307" definition-exists="false" ipc-concordant="H03K17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>circuits simulating a diode, e.g. threshold zero</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/51" definition-exists="false" ipc-concordant="H03K17/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K17/51</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>characterised by the components used </text><reference><text><class-ref scheme="cpc">H03K17/04</class-ref> - <class-ref scheme="cpc">H03K17/30</class-ref>, <class-ref scheme="cpc">H03K17/94</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K17/515" definition-exists="false" ipc-concordant="H03K17/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/52" definition-exists="false" ipc-concordant="H03K17/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/52</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements, of gas-filled tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/54" definition-exists="false" ipc-concordant="H03K17/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/54</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements of vacuum tubes </text><reference><text>using diodes <class-ref scheme="cpc">H03K17/74</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/545" definition-exists="false" ipc-concordant="H03K17/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03K17/545</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>using microengineered devices, e.g. field emission devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/56" definition-exists="false" ipc-concordant="H03K17/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/56</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements, of semiconductor devices </text><reference><text>using diodes <class-ref scheme="cpc">H03K17/74</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/567" definition-exists="false" ipc-concordant="H03K17/567" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/567</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/58" definition-exists="false" ipc-concordant="H03K17/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/58</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being tunnel diodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/60" definition-exists="true" ipc-concordant="H03K17/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/60</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being bipolar transistors </text><reference><text>bipolar transistors having four or more electrodes <class-ref scheme="cpc">H03K17/72</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/601" definition-exists="false" ipc-concordant="H03K17/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/601</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transformer coupling </text><reference><text><class-ref scheme="cpc">H03K17/61</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/602" definition-exists="false" ipc-concordant="H03K17/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in integrated circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/603" definition-exists="false" ipc-concordant="H03K17/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/603</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with coupled emitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/605" definition-exists="false" ipc-concordant="H03K17/605" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/605</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with galvanic isolation between the control circuit and the output circuit </text><reference><text><class-ref scheme="cpc">H03K17/78</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/61" definition-exists="false" ipc-concordant="H03K17/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transformer coupling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/615" definition-exists="false" ipc-concordant="H03K17/615" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/615</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a Darlington configuration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/62" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/62</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors </text><reference><text>logic circuits <class-ref scheme="cpc">H03K19/00</class-ref>; code converters <class-ref scheme="cpc">H03M5/00</class-ref>, <class-ref scheme="cpc">H03M7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6207" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K17/6207</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>without selecting means </text><reference><text><class-ref scheme="cpc">H03K17/6242</class-ref> - <class-ref scheme="cpc">H03K17/6285</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/6214" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6221" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K17/6221</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>combined with selecting means </text><reference><text><class-ref scheme="cpc">H03K17/6242</class-ref> - <class-ref scheme="cpc">H03K17/6285</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/6228" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6235" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with storage of control signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6242" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several inputs only and without selecting means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/625" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6257" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several inputs only combined with selecting means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/6264" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6271" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several outputs only and without selecting means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/6278" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6285" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several outputs only combined with selecting means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/6292" definition-exists="false" ipc-concordant="H03K17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current steering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/64" definition-exists="true" ipc-concordant="H03K17/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K17/64</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>having inductive loads</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/66" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switching arrangements for passing the current in either direction at will</text></title-part><title-part><text>Switching arrangements for reversing the current at will</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/661" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>connected to both load terminals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/662" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>each output circuit comprising more than one controlled bipolar transistor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/663" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using complementary bipolar transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/664" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a symmetrical configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/665" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/665</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>connected to one load terminal only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/666" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the output circuit comprising more than one controlled bipolar transistor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/667" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/667</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using complementary bipolar transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/668" definition-exists="false" ipc-concordant="H03K17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a symmetrical configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/68" definition-exists="false" ipc-concordant="H03K17/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for switching ac currents or voltages</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/687" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/687</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being field-effect transistors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/6871" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6871</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the output circuit comprising more than one controlled field-effect transistor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6872" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using complementary field-effect transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6874" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a symmetrical configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/6875" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/6875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using self-conductive, depletion FETs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/6877" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the control circuit comprising active elements different from those used in the output circuit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/6878" definition-exists="false" ipc-concordant="H03K17/687" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/6878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multi-gate field-effect transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/689" definition-exists="false" ipc-concordant="H03K17/689" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/689</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with galvanic isolation between the control circuit and the output circuit </text><reference><text><class-ref scheme="cpc">H03K17/78</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/6895" definition-exists="false" ipc-concordant="H03K17/689" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/6895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acoustic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/691" definition-exists="false" ipc-concordant="H03K17/691" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/691</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transformer coupling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/693" definition-exists="true" ipc-concordant="H03K17/693" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/693</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors </text><reference><text>logic circuits <class-ref scheme="cpc">H03K19/00</class-ref>; code converters <class-ref scheme="cpc">H03M5/00</class-ref>, <class-ref scheme="cpc">H03M7/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/70" definition-exists="false" ipc-concordant="H03K17/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/70</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices having only two electrodes and exhibiting negative resistance </text><reference><text>the devices being tunnel diodes <class-ref scheme="cpc">H03K17/58</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/72" definition-exists="false" ipc-concordant="H03K17/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having more than two PN junctions</text></title-part><title-part><text>having more than three electrodes</text></title-part><title-part><text>having more than one electrode connected to the same conductivity region</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/722" definition-exists="false" ipc-concordant="H03K17/722" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/722</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with galvanic isolation between the control circuit and the output circuit </text><reference><text><class-ref scheme="cpc">H03K17/78</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/7225" definition-exists="false" ipc-concordant="H03K17/722" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/7225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acoustic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/723" definition-exists="false" ipc-concordant="H03K17/723" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/723</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transformer coupling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/725" definition-exists="false" ipc-concordant="H03K17/725" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/725</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for ac voltages or currents </text><reference><text><class-ref scheme="cpc">H03K17/722</class-ref>, <class-ref scheme="cpc">H03K17/735</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/73" definition-exists="false" ipc-concordant="H03K17/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/73</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for dc voltages or currents </text><reference><text><class-ref scheme="cpc">H03K17/722</class-ref>, <class-ref scheme="cpc">H03K17/735</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/731" definition-exists="false" ipc-concordant="H03K17/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K17/731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with inductive load</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/732" definition-exists="false" ipc-concordant="H03K17/732" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/732</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measures for enabling turn-off</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/735" definition-exists="false" ipc-concordant="H03K17/735" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/735</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors </text><reference><text><class-ref scheme="cpc">H03K17/722</class-ref> takes precedence; logic circuits <class-ref scheme="cpc">H03K19/00</class-ref>; code converters <class-ref scheme="cpc">H03M5/00</class-ref>, <class-ref scheme="cpc">H03M7/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/74" definition-exists="false" ipc-concordant="H03K17/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/74</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements, of diodes </text><reference><text>by the use of more than one type of semiconductor device <class-ref scheme="cpc">H03K17/567</class-ref>; by the use of tunnel diodes <class-ref scheme="cpc">H03K17/58</class-ref>; by the use of negative resistance diodes <class-ref scheme="cpc">H03K17/70</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/76" definition-exists="false" ipc-concordant="H03K17/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/76</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors </text><reference><text>logic circuits <class-ref scheme="cpc">H03K19/00</class-ref>; code converters <class-ref scheme="cpc">H03M5/00</class-ref>, <class-ref scheme="cpc">H03M7/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/78" definition-exists="false" ipc-concordant="H03K17/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/785" definition-exists="false" ipc-concordant="H03K17/785" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/785</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling field-effect transistor switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/79" definition-exists="false" ipc-concordant="H03K17/79" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/79</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling </text><CPC-specific-text><text>bipolar</text></CPC-specific-text><text> semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/795" definition-exists="false" ipc-concordant="H03K17/795" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/795</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>controlling bipolar transistors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/7955" definition-exists="false" ipc-concordant="H03K17/795" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/7955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phototransistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/80" definition-exists="false" ipc-concordant="H03K17/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using non-linear magnetic devices</text></title-part><title-part><text>using non-linear dielectric devices </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K17/95</class-ref>, <class-ref scheme="cpc">H03K17/97</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/81" definition-exists="false" ipc-concordant="H03K17/81" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/81</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors </text><reference><text>logic circuits <class-ref scheme="cpc">H03K19/00</class-ref>; code converters <class-ref scheme="cpc">H03M5/00</class-ref>, <class-ref scheme="cpc">H03M7/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/82" definition-exists="false" ipc-concordant="H03K17/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/82</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being transfluxors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/84" definition-exists="false" ipc-concordant="H03K17/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/84</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being thin-film devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/86" definition-exists="false" ipc-concordant="H03K17/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/86</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the devices being twistors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/88" definition-exists="false" ipc-concordant="H03K17/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/88</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>By the use, as active elements, of beam-deflection tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/90" definition-exists="false" ipc-concordant="H03K17/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/90</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices </text><reference><text><class-ref scheme="cpc">H03K17/95</class-ref>, <class-ref scheme="cpc">H03K17/97</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/92" definition-exists="false" ipc-concordant="H03K17/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/92</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by the use, as active elements, of superconductive devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K17/94" definition-exists="true" ipc-concordant="H03K17/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/94</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>characterised by the way in which the control signals are generated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/941" definition-exists="true" ipc-concordant="H03K17/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/941</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an optical detector </text><reference><text><class-ref scheme="cpc">H03K17/968</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/943" definition-exists="false" ipc-concordant="H03K17/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/943</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of optical emitters or detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/945" definition-exists="true" ipc-concordant="H03K17/945" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K17/945</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Proximity switches </text><reference><text><class-ref scheme="cpc">H03K17/96</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K17/9455" definition-exists="false" ipc-concordant="H03K17/945" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>constructional details </text><reference><text>of proximity switches using a magnetic detector <class-ref scheme="cpc">H03K17/9505</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/95" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a magnetic detector</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9502" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures for increasing reliability</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9505" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9507" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with illumination</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/951" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/951</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures for supplying operating voltage to the detector circuit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9512" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9512</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital techniques</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9515" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non-linear magnetic devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9517" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using galvanomagnetic devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/952" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/952</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using inductive coils</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/9522" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a galvanically isolated probe</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9527" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9527</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of coils in the emitter or receiver; Magnetic detector comprising emitting and receiving coils</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/953" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/953</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming part of an oscillator </text><reference><text><class-ref scheme="cpc">H03K17/9537</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/9532" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/9535" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable amplitude</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/9537" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9537</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a resonant circuit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/954" definition-exists="false" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/954</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by an oscillatory signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K17/9542" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming part of an oscillator</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/9545" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K17/9547" definition-exists="true" ipc-concordant="H03K17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable amplitude</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/955" definition-exists="true" ipc-concordant="H03K17/955" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/955</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a capacitive detector</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/96" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K17/96</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Touch switches </text><reference><text>specially adapted for electronic time-pieces with no moving parts <class-ref scheme="cpc">G04G21/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K17/9602" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the type or shape of the sensing electrodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/9604" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the number of electrodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9606" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one electrode only per touch switch</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H03K17/9609" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9609</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the electrode is the object to be switched</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H03K17/9611" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the electrode is a plant</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9613" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9613</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two electrodes per touch switch</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9615" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using three electrodes per touch switch</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/9618" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/962" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/962</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capacitive touch switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9622" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/9625" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9625</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a force resistance transducer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/9627" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical touch switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9629" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9631" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a light source as part of the switch</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K17/9634" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9634</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using organic light emitting devices, e.g. light emitting polymer [OEP] or OLED</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K17/9636" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a pulsed light source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9638" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a light guide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/964" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/964</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Piezo-electric touch switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9643" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/9645" definition-exists="true" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resistive touch switches</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/9647" definition-exists="false" ipc-concordant="H03K17/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/9647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of detectors, e.g. keyboard</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K17/965" definition-exists="true" ipc-concordant="H03K17/965" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/965</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switches controlled by moving an element forming part of the switch</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/967" definition-exists="false" ipc-concordant="H03K17/967" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/967</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a plurality of control members, e.g. keyboard </text><reference><text><class-ref scheme="cpc">H03K17/969</class-ref>, <class-ref scheme="cpc">H03K17/972</class-ref>, <class-ref scheme="cpc">H03K17/98</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/968" definition-exists="true" ipc-concordant="H03K17/968" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/968</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using opto-electronic devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/969" definition-exists="true" ipc-concordant="H03K17/969" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/969</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a plurality of control members, e.g. keyboard</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/97" definition-exists="true" ipc-concordant="H03K17/97" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/97</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a magnetic movable element</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/9706" definition-exists="false" ipc-concordant="H03K17/97" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inductive element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/9713" definition-exists="false" ipc-concordant="H03K17/97" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9713</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiposition, e.g. involving comparison with different thresholds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/972" definition-exists="false" ipc-concordant="H03K17/972" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/972</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a plurality of control members, e.g. keyboard</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K17/975" definition-exists="true" ipc-concordant="H03K17/975" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/975</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a capacitive movable element</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K17/9755" definition-exists="false" ipc-concordant="H03K17/975" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2017/9755</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ohmic switch;</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K17/98" definition-exists="false" ipc-concordant="H03K17/98" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K17/98</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a plurality of control members, e.g. keyboard</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K19/00" definition-exists="true" ipc-concordant="H03K19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Logic circuits, i.e. having at least two inputs acting on one output </text><reference><text>circuits for computer systems using fuzzy logic <class-ref scheme="cpc">G06N7/02</class-ref></text></reference></title-part><title-part><text>Inverting circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K19/0002" definition-exists="false" ipc-concordant="H03K19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistate logic </text><reference><text><class-ref scheme="cpc">H03K19/02</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/018" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bipolar transistors only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/01806" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interface arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/01812" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K19/01812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/01818" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for integrated injection logic (I2L)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/01825" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling arrangements, impedance matching circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/01831" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01831</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/01837" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01837</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>programmable</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/01843" definition-exists="false" ipc-concordant="H03K19/018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a bidirectional operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/0185" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0185</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using field effect transistors only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/018507" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interface arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/018514" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018514</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage </text><reference><text><class-ref scheme="cpc">H03K19/018528</class-ref> and <class-ref scheme="cpc">H03K19/018542</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/018521" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K19/018521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of complementary type, e.g. CMOS</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/018528" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/018535" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K19/018535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of Schottky barrier type [MESFET]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/018542" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/01855" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/01855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>synchronous, i.e. using clock signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/018557" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling arrangements; Impedance matching circuits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/018564" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage </text><reference><text><class-ref scheme="cpc">H03K19/018578</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/018571" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018571</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of complementary type, e.g. CMOS</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/018578" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018578</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one differential stage</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/018585" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>programmable</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/018592" definition-exists="false" ipc-concordant="H03K19/0185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/018592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a bidirectional operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K19/02" definition-exists="false" ipc-concordant="H03K19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K19/02</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using specified components </text><reference><CPC-specific-text><text><class-ref scheme="cpc">H03K19/0005</class-ref> - <class-ref scheme="cpc">H03K19/0021</class-ref></text></CPC-specific-text><text>, <class-ref scheme="cpc">H03K19/003</class-ref> - <class-ref scheme="cpc">H03K19/0175</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/04" definition-exists="false" ipc-concordant="H03K19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gas-filled tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/06" definition-exists="false" ipc-concordant="H03K19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using vacuum tubes </text><reference><text>using diode rectifiers <class-ref scheme="cpc">H03K19/12</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/08" definition-exists="false" ipc-concordant="H03K19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using semiconductor devices </text><reference><text><class-ref scheme="cpc">H03K19/173</class-ref> takes precedence; wherein the semiconductor devices are only diode rectifiers <class-ref scheme="cpc">H03K19/12</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/0806" definition-exists="false" ipc-concordant="H03K19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using charge transfer devices (DTC, CCD)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/0813" definition-exists="false" ipc-concordant="H03K19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Threshold logic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/082" definition-exists="true" ipc-concordant="H03K19/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K19/082</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using bipolar transistors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/0823" definition-exists="false" ipc-concordant="H03K19/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistate logic</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0826" definition-exists="false" ipc-concordant="H03K19/082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one of the states being the high impedance or floating state</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/084" definition-exists="false" ipc-concordant="H03K19/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diode-transistor logic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0843" definition-exists="false" ipc-concordant="H03K19/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complementary transistor logic [CTL]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0846" definition-exists="false" ipc-concordant="H03K19/084" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Schottky transistor logic [STL]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/086" definition-exists="false" ipc-concordant="H03K19/086" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emitter coupled logic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0863" definition-exists="false" ipc-concordant="H03K19/086" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emitter function logic [EFL]; Base coupled logic [BCL]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0866" definition-exists="false" ipc-concordant="H03K19/086" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked emitter coupled logic </text><reference><text><class-ref scheme="cpc">H03K19/1738</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/088" definition-exists="false" ipc-concordant="H03K19/088" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transistor-transistor logic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/09" definition-exists="false" ipc-concordant="H03K19/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistor-transistor logic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/091" definition-exists="false" ipc-concordant="H03K19/091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrated injection logic or merged transistor logic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0912" definition-exists="false" ipc-concordant="H03K19/091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0912</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Static induction logic [STIL] </text><reference><text>when the logic function is fullfilled by a fet <class-ref scheme="cpc">H03K19/09414</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0915" definition-exists="false" ipc-concordant="H03K19/091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated schottky logic [ISL]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0917" definition-exists="false" ipc-concordant="H03K19/091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0917</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistate logic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/094" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using field-effect transistors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/09403" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using junction field-effect transistors </text><reference><text><class-ref scheme="cpc">H03K19/096</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09407" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the same canal type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0941" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0941</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of complementary type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09414" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with gate injection or static induction [STIL] </text><reference><text><class-ref scheme="cpc">H03K19/0912</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09418" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with bipolar transistors [BIFET]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/09421" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diode field-effect transistor logic </text><reference><text><class-ref scheme="cpc">H03K19/0956</class-ref>, <class-ref scheme="cpc">H03K19/096</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/09425" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistate logic </text><reference><text><class-ref scheme="cpc">H03K19/096</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09429" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one of the states being the high impedance or floating state</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/09432" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with coupled sources or source coupled logic </text><reference><text><class-ref scheme="cpc">H03K19/096</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09436" definition-exists="false" ipc-concordant="H03K19/094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Source coupled field-effect logic [SCFL]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/0944" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0944</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using MOSFET </text><CPC-specific-text><text>or insulated gate field-effect transistors, i.e. IGFET</text></CPC-specific-text><reference><text><class-ref scheme="cpc">H03K19/096</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09441" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the same canal type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/09443" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of enhancement and depletion transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K19/09445" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with active depletion transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/09446" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only depletion transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/09448" definition-exists="false" ipc-concordant="H03K19/0944" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with bipolar transistors [BIMOS]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0948" definition-exists="false" ipc-concordant="H03K19/0948" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0948</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using CMOS </text><CPC-specific-text><text>or complementary insulated gate field-effect transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/09482" definition-exists="false" ipc-concordant="H03K19/0948" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of enhancement and depletion transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K19/09485" definition-exists="false" ipc-concordant="H03K19/0948" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with active depletion transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/09487" definition-exists="false" ipc-concordant="H03K19/0948" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/09487</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only depletion transistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/0952" definition-exists="false" ipc-concordant="H03K19/0952" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0952</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Schottky type FET </text><CPC-specific-text><text>MESFET</text></CPC-specific-text><reference><CPC-specific-text><text><class-ref scheme="cpc">H03K19/09421</class-ref>, <class-ref scheme="cpc">H03K19/09432</class-ref></text></CPC-specific-text><text>, <class-ref scheme="cpc">H03K19/096</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/0956" definition-exists="false" ipc-concordant="H03K19/0956" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0956</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Schottky diode FET logic </text><reference><text><class-ref scheme="cpc">H03K19/096</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/096" definition-exists="false" ipc-concordant="H03K19/096" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/096</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synchronous circuits, i.e. using clock signals </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K19/01728</class-ref>, <class-ref scheme="cpc">H03K19/01855</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0963" definition-exists="false" ipc-concordant="H03K19/096" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0963</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transistors of complementary type </text><reference><text><class-ref scheme="cpc">H03K19/0966</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/0966" definition-exists="false" ipc-concordant="H03K19/096" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/0966</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Self-timed logic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/098" definition-exists="false" ipc-concordant="H03K19/098" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/098</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thyristors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/10" definition-exists="false" ipc-concordant="H03K19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tunnel diodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/12" definition-exists="true" ipc-concordant="H03K19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K19/12</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using diode rectifiers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/14" definition-exists="false" ipc-concordant="H03K19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K19/14</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled </text><reference><text>optical logic elements <class-ref scheme="cpc">G02F3/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/16" definition-exists="false" ipc-concordant="H03K19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using saturable magnetic devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/162" definition-exists="false" ipc-concordant="H03K19/162" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using parametrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/164" definition-exists="false" ipc-concordant="H03K19/164" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferro-resonant devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/166" definition-exists="false" ipc-concordant="H03K19/166" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transfluxors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/168" definition-exists="false" ipc-concordant="H03K19/168" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thin-film devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/17" definition-exists="false" ipc-concordant="H03K19/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using twistors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/173" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/173</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using elementary logic circuits as components</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/1731" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optimisation thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1732" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1732</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by limitation or reduction of the pin/gate ratio </text><reference><text>for data-processing equipment <class-ref scheme="cpc">G06F1/22</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/1733" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controllable logic circuits </text><reference><text><class-ref scheme="cpc">H03K19/177</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1735" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1735</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by wiring, e.g. uncommitted logic arrays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/1736" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1736</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the wiring can be modified</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1737" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1737</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiplexers </text><reference><text><class-ref scheme="cpc">H03K19/1738</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1738" definition-exists="false" ipc-concordant="H03K19/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1738</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using cascode switch logic [CSL] or cascode emitter coupled logic [CECL]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/177" definition-exists="false" ipc-concordant="H03K19/177" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/177</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged in matrix form</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/17704" definition-exists="false" ipc-concordant="H03K19/17704" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17704</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the logic functions being realised by the interconnection of rows and columns</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17708" definition-exists="false" ipc-concordant="H03K19/17704" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an AND matrix followed by an OR matrix, i.e. programmable logic arrays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/17712" definition-exists="false" ipc-concordant="H03K19/17704" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17712</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one of the matrices at least being reprogrammable</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H03K19/17716" definition-exists="false" ipc-concordant="H03K19/17704" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17716</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation, i.e. using clock signals, e.g. of I/O or coupling register </text><reference><text><class-ref scheme="cpc">H03K19/17712</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H03K19/1772" definition-exists="false" ipc-concordant="H03K19/17704" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/1772</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with synchronous operation of at least one of the logical matrixes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/17724" definition-exists="false" ipc-concordant="H03K19/17724" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17724</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Structural details of logic blocks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17728" definition-exists="false" ipc-concordant="H03K19/17728" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17728</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Reconfigurable logic blocks, e.g. lookup tables</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17732" definition-exists="false" ipc-concordant="H03K19/17732" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17732</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Macroblocks</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/17736" definition-exists="false" ipc-concordant="H03K19/17736" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17736</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Structural details of routing resources</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/1774" definition-exists="false" ipc-concordant="H03K19/17736" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/1774</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for global signals, e.g. clock, reset</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17744" definition-exists="false" ipc-concordant="H03K19/17736" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17744</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for input/output signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/17748" definition-exists="false" ipc-concordant="H03K19/17748" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17748</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Structural details of configuration resources</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17752" definition-exists="false" ipc-concordant="H03K19/17752" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17752</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for hot reconfiguration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17756" definition-exists="false" ipc-concordant="H03K19/17756" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17756</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for partial configuration or partial reconfiguration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17758" definition-exists="false" ipc-concordant="H03K19/17758" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17758</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for speeding up configuration or reconfiguration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/1776" definition-exists="false" ipc-concordant="H03K19/1776" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/1776</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for memories</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17764" definition-exists="false" ipc-concordant="H03K19/17764" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17764</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for reliability</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17768" definition-exists="false" ipc-concordant="H03K19/17768" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17768</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for security</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17772" definition-exists="false" ipc-concordant="H03K19/17772" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17772</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for powering on or off</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1778" definition-exists="false" ipc-concordant="H03K19/1778" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/1778</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Structural details for adapting physical parameters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17784" definition-exists="false" ipc-concordant="H03K19/17784" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17784</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for supply voltage</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17788" definition-exists="false" ipc-concordant="H03K19/17788" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17788</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for input/output [I/O] voltages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17792" definition-exists="false" ipc-concordant="H03K19/17792" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17792</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for operating speed</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H03K19/17796" definition-exists="false" ipc-concordant="H03K19/17796" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>H03K19/17796</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for physical disposition of blocks</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/18" definition-exists="false" ipc-concordant="H03K19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using galvano-magnetic devices, e.g. Hall-effect devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/185" definition-exists="false" ipc-concordant="H03K19/185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using dielectric elements with variable dielectric constant, e.g. ferro-electric capacitors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/19" definition-exists="false" ipc-concordant="H03K19/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferro-resonant devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/195" definition-exists="false" ipc-concordant="H03K19/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/195</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using superconductive devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/1952" definition-exists="false" ipc-concordant="H03K19/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1952</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electro-magnetic coupling of the control current</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/1954" definition-exists="false" ipc-concordant="H03K19/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1954</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with injection of the control current</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/1956" definition-exists="false" ipc-concordant="H03K19/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1956</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an inductorless circuit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/1958" definition-exists="false" ipc-concordant="H03K19/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/1958</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hybrid configuration, i.e. using electromagnetic coupling and injection of the control current</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K19/20" definition-exists="false" ipc-concordant="H03K19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K19/20</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>characterised by logic function, e.g. AND, OR, NOR, NOT circuits </text><reference><text><class-ref scheme="cpc">H03K19/003</class-ref> - <class-ref scheme="cpc">H03K19/01</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/21" definition-exists="false" ipc-concordant="H03K19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input</text></title-part><title-part><text>COINCIDENCE circuits, i.e. giving output only if all input signals are identical</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/212" definition-exists="false" ipc-concordant="H03K19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bipolar transistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K19/215" definition-exists="false" ipc-concordant="H03K19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field-effect transistors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K19/217" definition-exists="false" ipc-concordant="H03K19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using Schottky type FET [MESFET]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K19/23" definition-exists="false" ipc-concordant="H03K19/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K19/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Majority or minority circuits, i.e. giving output having the state of the majority or the minority of the inputs</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K21/00" definition-exists="true" ipc-concordant="H03K21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K21/00</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Details of pulse counters or frequency dividers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/02" definition-exists="true" ipc-concordant="H03K21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Input circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/023" definition-exists="false" ipc-concordant="H03K21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising pulse shaping or differentiating circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/026" definition-exists="false" ipc-concordant="H03K21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising logic circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/08" definition-exists="true" ipc-concordant="H03K21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Output circuits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/10" definition-exists="false" ipc-concordant="H03K21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising logic circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/12" definition-exists="false" ipc-concordant="H03K21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>H03K21/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with parallel read-out</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/14" definition-exists="false" ipc-concordant="H03K21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>H03K21/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with series read-out of number stored</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/16" definition-exists="true" ipc-concordant="H03K21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits for carrying over pulses between successive decades</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/17" definition-exists="false" ipc-concordant="H03K21/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with field effect transistors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/18" definition-exists="true" ipc-concordant="H03K21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits for visual indication of the result</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/20" definition-exists="false" ipc-concordant="H03K21/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using glow discharge lamps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/38" definition-exists="true" ipc-concordant="H03K21/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Starting, stopping or resetting the counter </text><reference><text>counters with a base other than a power of two <class-ref scheme="cpc">H03K23/48</class-ref>, <class-ref scheme="cpc">H03K23/66</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K21/40" definition-exists="true" ipc-concordant="H03K21/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring</text></title-part><title-part><text>Error detection</text></title-part><title-part><text>Preventing or correcting improper counter operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/403" definition-exists="false" ipc-concordant="H03K21/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for storing the counting state in case of power supply interruption</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K21/406" definition-exists="false" ipc-concordant="H03K21/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K21/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation of counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K23/00" definition-exists="true" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulse counters comprising counting chains</text></title-part><title-part><text>Frequency dividers comprising counting chains </text><reference><text><class-ref scheme="cpc">H03K29/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/001" definition-exists="true" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/001</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using elements not covered by groups <class-ref scheme="cpc">H03K23/002</class-ref> and <class-ref scheme="cpc">H03K23/74</class-ref> - <class-ref scheme="cpc">H03K23/84</class-ref></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/002" definition-exists="false" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using semiconductor devices </text><reference><text><class-ref scheme="cpc">H03K23/78</class-ref>, <class-ref scheme="cpc">H03K23/80</class-ref>, <class-ref scheme="cpc">H03K23/84</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/004" definition-exists="true" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>H03K23/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counters counting in a non-natural counting order, e.g. random counters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/005" definition-exists="false" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using minimum change code, e.g. Gray Code</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/007" definition-exists="false" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using excess three code</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/008" definition-exists="false" ipc-concordant="H03K23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using biquinary code</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/40" definition-exists="true" ipc-concordant="H03K23/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/40</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Gating or clocking signals applied to all stages, i.e. synchronous counters </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K23/74</class-ref> - <class-ref scheme="cpc">H03K23/84</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/42" definition-exists="false" ipc-concordant="H03K23/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Out-of-phase gating or clocking signals applied to counter stages</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/425" definition-exists="false" ipc-concordant="H03K23/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bistables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/44" definition-exists="false" ipc-concordant="H03K23/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using field-effect transistors </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03K23/46</class-ref> and <class-ref scheme="cpc">H03K23/425</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/46" definition-exists="false" ipc-concordant="H03K23/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using charge transfer devices, i.e. bucket brigade or charge coupled devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/48" definition-exists="false" ipc-concordant="H03K23/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a base or radix other than a power of two </text><reference><text><class-ref scheme="cpc">H03K23/42</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/483" definition-exists="false" ipc-concordant="H03K23/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is an odd number</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/486" definition-exists="false" ipc-concordant="H03K23/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is a non-integer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/50" definition-exists="false" ipc-concordant="H03K23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/50</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using bi-stable regenerative trigger circuits </text><reference><text><class-ref scheme="cpc">H03K23/42</class-ref> - <class-ref scheme="cpc">H03K23/48</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/502" definition-exists="false" ipc-concordant="H03K23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base or a radix other than a power of two </text><reference><text><class-ref scheme="cpc">H03K23/54</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/505" definition-exists="false" ipc-concordant="H03K23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is an odd number</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/507" definition-exists="false" ipc-concordant="H03K23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is a non-integer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/52" definition-exists="false" ipc-concordant="H03K23/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using field-effect transistors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/54" definition-exists="false" ipc-concordant="H03K23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ring counters, i.e. feedback shift register counters </text><reference><text><class-ref scheme="cpc">H03K23/52</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/542" definition-exists="false" ipc-concordant="H03K23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with crossed-couplings, i.e. Johnson counters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/544" definition-exists="false" ipc-concordant="H03K23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is an odd number</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/546" definition-exists="false" ipc-concordant="H03K23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/546</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is a non-integer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03K23/548" definition-exists="false" ipc-concordant="H03K23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/548</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reversible counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/56" definition-exists="false" ipc-concordant="H03K23/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reversible counters </text><reference><text><class-ref scheme="cpc">H03K23/52</class-ref> </text><CPC-specific-text><text>and <class-ref scheme="cpc">H03K23/548</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/58" definition-exists="true" ipc-concordant="H03K23/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/58</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Gating or clocking signals not applied to all stages, i.e. asynchronous counters </text><reference><text><class-ref scheme="cpc">H03K23/74</class-ref> - <class-ref scheme="cpc">H03K23/84</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/582" definition-exists="false" ipc-concordant="H03K23/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base or a radix different of a power of two</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/584" definition-exists="false" ipc-concordant="H03K23/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is an odd number</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/586" definition-exists="false" ipc-concordant="H03K23/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a base which is a non-integer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/588" definition-exists="false" ipc-concordant="H03K23/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of a synchronous and an asynchronous counter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/60" definition-exists="false" ipc-concordant="H03K23/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with field-effect transistors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/62" definition-exists="false" ipc-concordant="H03K23/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>reversible</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/64" definition-exists="true" ipc-concordant="H03K23/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/64</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>with a base or radix other than a power of two </text><reference><text><class-ref scheme="cpc">H03K23/40</class-ref> - <class-ref scheme="cpc">H03K23/62</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/66" definition-exists="false" ipc-concordant="H03K23/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a variable counting base, e.g. by presetting or by adding or suppressing pulses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/662" definition-exists="false" ipc-concordant="H03K23/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adding or suppressing pulses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/665" definition-exists="false" ipc-concordant="H03K23/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/665</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by presetting</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03K23/667" definition-exists="false" ipc-concordant="H03K23/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/667</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by switching the base during a counting cycle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/68" definition-exists="false" ipc-concordant="H03K23/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a base which is a non-integer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/70" definition-exists="false" ipc-concordant="H03K23/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a base which is an odd number </text><reference><text><class-ref scheme="cpc">H03K23/66</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/72" definition-exists="false" ipc-concordant="H03K23/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Decade counters </text><reference><text><class-ref scheme="cpc">H03K23/66</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/74" definition-exists="false" ipc-concordant="H03K23/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using relays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/76" definition-exists="false" ipc-concordant="H03K23/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic cores or ferro-electric capacitors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/763" definition-exists="false" ipc-concordant="H03K23/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/763</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using superconductive devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/766" definition-exists="false" ipc-concordant="H03K23/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/766</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thin-film devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/78" definition-exists="false" ipc-concordant="H03K23/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using opto-electronic devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/80" definition-exists="true" ipc-concordant="H03K23/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>H03K23/80</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>using semiconductor devices having only two electrodes, e.g. tunnel diode, multi-layer diode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/82" definition-exists="false" ipc-concordant="H03K23/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gas-filled tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K23/825" definition-exists="false" ipc-concordant="H03K23/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using vacuum tubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/84" definition-exists="false" ipc-concordant="H03K23/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K23/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thyristors or unijunction transistors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K23/86" definition-exists="false" ipc-concordant="H03K23/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K23/86</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>reversible </text><reference><text><class-ref scheme="cpc">H03K23/40</class-ref> - <class-ref scheme="cpc">H03K23/84</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K25/00" definition-exists="true" ipc-concordant="H03K25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K25/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulse counters with step-by-step integration and static storage</text></title-part><title-part><text>Analogous frequency dividers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K25/02" definition-exists="false" ipc-concordant="H03K25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising charge storage, e.g. capacitor without polarisation hysteresis</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03K25/04" definition-exists="false" ipc-concordant="H03K25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03K25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using auxiliary pulse generator triggered by the incoming pulses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K25/12" definition-exists="false" ipc-concordant="H03K25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K25/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising hysteresis storage</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K27/00" definition-exists="true" ipc-concordant="H03K27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K27/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulse counters in which pulses are continuously circulated in a closed loop</text></title-part><title-part><text>Analogous frequency dividers </text><reference><text>feedback shift register counters <class-ref scheme="cpc">H03K23/54</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K29/00" definition-exists="true" ipc-concordant="H03K29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K29/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale</text></title-part><title-part><text>Analogous frequency dividers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K29/04" definition-exists="false" ipc-concordant="H03K29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K29/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multi-cathode gas discharge tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03K29/06" definition-exists="false" ipc-concordant="H03K29/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K29/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using beam-type tubes, e.g. magnetrons, cathode-ray tubes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03K99/00" definition-exists="false" ipc-concordant="H03K99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K99/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H03K217/00" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H03K217/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by <class-ref scheme="cpc">H03K17/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0009" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>AC switches, i.e. delivering AC power to a load</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0018" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Special modifications or use of the back gate voltage of a FET</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0027" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H03K2217/0027</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Measuring means of, e.g. currents through or voltages across the switch</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means reducing energy consumption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0045" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Full bridges, determining the direction of the current through the load</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0054" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gating switches, e.g. pass gates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>High side switches, i.e. the higher potential [DC] or life wire [AC] being directly connected to the switch and not via the load</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0072" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Low side switches, i.e. the lower potential [DC] or neutral wire [AC] being directly connected to the switch and not via the load</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/0081" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power supply means, e.g. to the switch driver</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/009" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resonant driver circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03K217/94" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the way in which the control signal is generated</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>activated by voice or sound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/9401" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9401</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration techniques</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical, e.g. by displacement of a body, a shielding element, or a magnet, in or out of the sensing area</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94021" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with human activation, e.g. processes requiring or being triggered by human intervention, user-input of digital word or analog voltage</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic threshold calibration</text></title-part><title-part><text>e.g. threshold automatically adapts to ambient conditions or follows variation of input</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94031" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration involving digital processing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple detection, i.e. where different switching signals are generated after operation of the user is detected at different time instants at different locations during the actuation movement by two or more sensors of the same or different kinds</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94042" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94042</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for reducing energy consumption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94047" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cascode connected switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94052" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94052</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with evaluation of actuation pattern or sequence, e.g. tapping</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94057" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94057</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with optical detection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with magnetic detection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with capacitive detection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94078" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with acoustic detection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/94084" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmission of parameters among sensors or between sensor and remote station</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94089" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94089</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wireless transmission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94094" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K2217/94094</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Wired transmission, e.g. via bus connection or similar</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/941" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/941</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using an optical detector</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94102" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94102</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the type of activation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/94104" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a light barrier</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/94106" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94106</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passive activation of light sensor, e.g. by ambient light</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/94108" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94108</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>making use of reflection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94111" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94111</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having more than one emitter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94112" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94112</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having more than one receiver</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94114" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/94114</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical multi axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/94116" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03K2217/94116</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>increasing reliability, fail-safe</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/945" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/945</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Proximity switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/95" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a magnetic detector</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/952" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/952</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection of ferromagnetic and non-magnetic conductive targets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/954" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/954</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ferromagnetic case</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/956" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/956</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Negative resistance, e.g. LC inductive proximity switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/958" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/958</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving transponders</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/96" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Touch switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using acoustic waves, e.g. ultrasound</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96011" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96011</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with propagation, SAW or BAW</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details for touch switches </text><reference><text>for capacitive touch switches <u>see</u> <class-ref scheme="cpc">H03K2217/9607</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96019" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96019</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using conductive paint</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96023" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of electro-mechanic connections between different elements, e.g.: sensing plate and integrated circuit containing electronics</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96027" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Piezoelectric snap spring</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96031" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combination of touch switch and LC display</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96035" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by temperature detection, i.e. body heat</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96038" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inductive touch switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96042" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96042</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with illumination</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Key-pad combined with display, back-lit</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/9605" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9605</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection of leakage or discharge current across the touching body to ground</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96054" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96054</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double function: touch detection combined with detection of a movable element</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96058" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96058</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fail-safe touch switches, where switching takes place only after repeated touch</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tactile or haptic feedback</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/96066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thumbwheel, potentiometer, scrollbar or slider simulation by touch switch</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/9607" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9607</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Capacitive touch switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/960705" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960705</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety of capacitive touch and proximity switches, e.g. increasing reliability, fail-safe</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/96071" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96071</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the detection principle</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960715" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960715</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rc-timing</text></title-part><title-part><text>e.g. measurement of variation of charge time or discharge time of the sensor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96072" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96072</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phase comparison, i.e. where a phase comparator receives at one input the signal directly from the oscillator, at a second input the same signal but delayed, with a delay depending on a sensing capacitance</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960725" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960725</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charge-transfer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude comparison</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/960735" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960735</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by circuit details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96074" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96074</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switched capacitor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960745" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960745</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Capacitive differential</text></title-part><title-part><text>e.g. comparison with reference capacitance</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96075" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving bridge circuit</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/960755" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960755</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details of capacitive touch and proximity switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96076" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with spring electrode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960765" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960765</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of shielding arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96077" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96077</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising an electrode which is floating</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960775" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960775</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emitter-receiver or "fringe" type detection, i.e. one or more field emitting electrodes and corresponding one or more receiving electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96078" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sensor being a wire or a strip, e.g. used in automobile door handles or bumpers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/960785" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960785</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with illumination</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/96079" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/96079</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single or more light guides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03K217/960795" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/960795</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using organic light emitting devices, e.g. light emitting polymer [OEP] or OLED</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03K217/965" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/965</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Switches controlled by moving an element forming part of the switch</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/9651" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9651</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the moving element acting on a force, e.g. pressure sensitive element</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/9653" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9653</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with illumination</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/9655" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9655</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single or more light guides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03K217/9656" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9656</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using organic light emitting devices, e.g. light emitting polymer [OEP] or OLED</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03K217/9658" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03K2217/9658</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety, e.g. fail-safe switching requiring a sequence of movements</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |