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113 lines
58 KiB
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113 lines
58 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="H03C" definition-exists="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>MODULATION </text><reference><text>masers or lasers <class-ref scheme="cpc">H01S</class-ref>; coding, decoding or code conversion <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> only modulation, keying, or interruption of sinusoidal oscillations or electromagnetic waves, the modulating signal having any desired waveform.</note-paragraph><note-paragraph>In this subclass, circuits usable both as modulator and demodulator are classified in the group dealing with the type of modulator involved.</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">H03C1/38</class-ref> - <class-ref scheme="ipc">H03C1/44</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">H03C1/36</class-ref></entry></row></table></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="H03C1/00" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03C1/00" definition-exists="true" ipc-concordant="H03C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude modulation </text><reference><text><class-ref scheme="cpc">H03C5/00</class-ref>, <class-ref scheme="cpc">H03C7/00</class-ref> take 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="H03C1/02" definition-exists="false" ipc-concordant="H03C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/02</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="H03C1/04" definition-exists="false" ipc-concordant="H03C1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means in or combined with modulating stage for reducing angle modulation</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="H03C1/06" definition-exists="false" ipc-concordant="H03C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03C1/06</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator</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="H03C1/08" definition-exists="true" ipc-concordant="H03C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03C1/08</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>by means of variable impedance element </text><reference><text><class-ref scheme="cpc">H03C1/28</class-ref> - <class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/46</class-ref> - <class-ref scheme="cpc">H03C1/52</class-ref>, <class-ref scheme="cpc">H03C1/62</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="H03C1/10" definition-exists="false" ipc-concordant="H03C1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a current-dependent inductor</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="H03C1/12" definition-exists="false" ipc-concordant="H03C1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a voltage-dependent capacitor</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="H03C1/14" definition-exists="false" ipc-concordant="H03C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a diode</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="H03C1/16" definition-exists="true" ipc-concordant="H03C1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03C1/16</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>by means of discharge device having at least three electrodes </text><reference><text><class-ref scheme="cpc">H03C1/28</class-ref> - <class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/50</class-ref>, <class-ref scheme="cpc">H03C1/52</class-ref>, <class-ref scheme="cpc">H03C1/62</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="H03C1/18" definition-exists="false" ipc-concordant="H03C1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>carrier applied to control grid</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C1/20" definition-exists="false" ipc-concordant="H03C1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>modulating signal applied to anode</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="H03C1/22" definition-exists="false" ipc-concordant="H03C1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>modulating signal applied to same grid</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="H03C1/24" definition-exists="false" ipc-concordant="H03C1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>modulating signal applied to different grid</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="H03C1/26" definition-exists="false" ipc-concordant="H03C1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>modulating signal applied to cathode</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="H03C1/28" definition-exists="false" ipc-concordant="H03C1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of transit-time tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C1/30" definition-exists="false" ipc-concordant="H03C1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of a magnetron</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="H03C1/32" definition-exists="false" ipc-concordant="H03C1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deflection of electron beam in discharge tube</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="H03C1/34" definition-exists="false" ipc-concordant="H03C1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of light-sensitive element</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="H03C1/36" definition-exists="true" ipc-concordant="H03C1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of semiconductor device having at least three electrodes </text><reference><text><class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/50</class-ref>, <class-ref scheme="cpc">H03C1/52</class-ref>, <class-ref scheme="cpc">H03C1/62</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="8" additional-only="false" sort-key="H03C1/46" definition-exists="false" ipc-concordant="H03C1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C1/46</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Modulators with mechanically-driven or acoustically-driven parts</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="H03C1/48" definition-exists="false" ipc-concordant="H03C1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of Hall-effect 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="H03C1/50" definition-exists="true" ipc-concordant="H03C1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03C1/50</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>by converting angle modulation to amplitude modulation </text><reference><text><class-ref scheme="cpc">H03C1/28</class-ref> - <class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/46</class-ref>, <class-ref scheme="cpc">H03C1/48</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="8" additional-only="false" sort-key="H03C1/52" definition-exists="true" ipc-concordant="H03C1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C1/52</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Modulators in which carrier or one sideband is wholly or partially suppressed </text><reference><text><class-ref scheme="cpc">H03C1/28</class-ref> - <class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/46</class-ref>, <class-ref scheme="cpc">H03C1/48</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="H03C1/54" definition-exists="false" ipc-concordant="H03C1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C1/54</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Balanced modulators, e.g. bridge type, ring type or double balanced type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C1/542" definition-exists="false" ipc-concordant="H03C1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising semiconductor devices with at least three electrodes</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="H03C1/545" definition-exists="false" ipc-concordant="H03C1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/545</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="11" additional-only="false" sort-key="H03C1/547" definition-exists="true" ipc-concordant="H03C1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/547</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></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C1/56" definition-exists="false" ipc-concordant="H03C1/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising variable two-pole elements 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="H03C1/58" definition-exists="false" ipc-concordant="H03C1/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising diodes</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="H03C1/60" definition-exists="false" ipc-concordant="H03C1/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C1/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one sideband wholly or partially suppressed</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="H03C1/62" definition-exists="true" ipc-concordant="H03C1/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03C1/62</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present </text><reference><text><class-ref scheme="cpc">H03C1/28</class-ref> - <class-ref scheme="cpc">H03C1/34</class-ref>, <class-ref scheme="cpc">H03C1/46</class-ref>, <class-ref scheme="cpc">H03C1/48</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="H03C3/00" definition-exists="true" ipc-concordant="H03C3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Angle modulation </text><reference><text><class-ref scheme="cpc">H03C5/00</class-ref>, <class-ref scheme="cpc">H03C7/00</class-ref> take 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="H03C3/005" definition-exists="false" ipc-concordant="H03C3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits for asymmetric 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="H03C3/02" definition-exists="false" ipc-concordant="H03C3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/02</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="H03C3/04" definition-exists="false" ipc-concordant="H03C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means in or combined with modulating stage for reducing amplitude modulation</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="H03C3/06" definition-exists="true" ipc-concordant="H03C3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C3/06</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Means for changing frequency deviation</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="H03C3/08" definition-exists="false" ipc-concordant="H03C3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03C3/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator</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="H03C3/09" definition-exists="true" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of modulator for regulating the mean frequency</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C3/0908" definition-exists="true" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0908</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a phase locked loop</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="H03C3/0916" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with frequency divider or counter in the loop</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="H03C3/0925" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying frequency modulation at the divider in the feedback loop</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="H03C3/0933" definition-exists="true" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fractional frequency division in the feedback loop of the phase locked loop</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="H03C3/0941" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0941</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying frequency modulation at more than one point in the loop</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="H03C3/095" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying frequency modulation to the loop in front of the voltage controlled oscillator</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="H03C3/0958" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0958</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying frequency modulation by varying the characteristics of the voltage controlled oscillator</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="H03C3/0966" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0966</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modulating the reference clock</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="H03C3/0975" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0975</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applying frequency modulation in the phase locked loop at components other than the divider, the voltage controlled oscillator or the reference clock</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="H03C3/0983" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0983</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing in the loop a mixer other than for phase detection</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="H03C3/0991" definition-exists="false" ipc-concordant="H03C3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/0991</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including calibration means or calibration methods</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="8" additional-only="false" sort-key="H03C3/10" definition-exists="true" ipc-concordant="H03C3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03C3/10</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>by means of variable impedance </text><reference><text><class-ref scheme="cpc">H03C3/30</class-ref> - <class-ref scheme="cpc">H03C3/38</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="H03C3/12" definition-exists="false" ipc-concordant="H03C3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of a variable reactive element</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C3/14" definition-exists="false" ipc-concordant="H03C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube 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="H03C3/145" definition-exists="false" ipc-concordant="H03C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using semiconductor elements</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="H03C3/16" definition-exists="false" ipc-concordant="H03C3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the active element simultaneously serves as the active element of an oscillator</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="H03C3/18" definition-exists="false" ipc-concordant="H03C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a current-dependent inductor</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="H03C3/20" definition-exists="false" ipc-concordant="H03C3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a voltage-dependent capacitor</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="H03C3/22" definition-exists="false" ipc-concordant="H03C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the element being a semiconductor diode, e.g. varicap diode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03C3/222" definition-exists="true" ipc-concordant="H03C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/222</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">H03C3/227</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="H03C3/225" definition-exists="true" ipc-concordant="H03C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/225</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">H03C3/227</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="H03C3/227" definition-exists="false" ipc-concordant="H03C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of bipolar transistors and field effect 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="9" additional-only="false" sort-key="H03C3/24" definition-exists="false" ipc-concordant="H03C3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of a variable resistive element, e.g. tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C3/245" definition-exists="false" ipc-concordant="H03C3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using semiconductor 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="H03C3/26" definition-exists="false" ipc-concordant="H03C3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising two elements controlled in push-pull by modulating signal</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="H03C3/28" definition-exists="false" ipc-concordant="H03C3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using variable impedance driven mechanically or acoustically</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="H03C3/30" definition-exists="false" ipc-concordant="H03C3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of transit-time tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C3/32" definition-exists="false" ipc-concordant="H03C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the tube being a magnetron</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="H03C3/34" definition-exists="false" ipc-concordant="H03C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deflection of electron beam in discharge tube</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="H03C3/36" definition-exists="false" ipc-concordant="H03C3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of light-sensitive element</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="H03C3/38" definition-exists="false" ipc-concordant="H03C3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by converting amplitude modulation to angle modulation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C3/40" definition-exists="false" ipc-concordant="H03C3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03C3/403" definition-exists="true" ipc-concordant="H03C3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two quadrature frequency conversion stages in cascade</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="H03C3/406" definition-exists="false" ipc-concordant="H03C3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a feedback loop containing mixers or demodulators</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="H03C3/42" definition-exists="true" ipc-concordant="H03C3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of electromechanical devices </text><reference><text><class-ref scheme="cpc">H03C3/28</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="7" additional-only="false" sort-key="H03C5/00" definition-exists="true" ipc-concordant="H03C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal </text><reference><text><class-ref scheme="cpc">H03C7/00</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="H03C5/02" definition-exists="false" ipc-concordant="H03C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of transit-time tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C5/04" definition-exists="false" ipc-concordant="H03C5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the tube being a magnetron</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="H03C5/06" definition-exists="false" ipc-concordant="H03C5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deflection of electron beam in discharge tube</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="H03C7/00" definition-exists="true" ipc-concordant="H03C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C7/00</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>Modulating electromagnetic waves </text><reference><text>devices or arrangements for the modulation of light <class-ref scheme="cpc">G02F1/00</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="H03C7/02" definition-exists="false" ipc-concordant="H03C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-05-01" status="published"><classification-symbol>H03C7/02</classification-symbol><class-title date-revised="2022-05-01"><title-part><text>in transmission lines, waveguides, cavity resonators or radiation fields of antennas</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C7/022" definition-exists="false" ipc-concordant="H03C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C7/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ferromagnetic devices, e.g. ferrites</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="H03C7/025" definition-exists="true" ipc-concordant="H03C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C7/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using semiconductor devices</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="H03C7/027" definition-exists="false" ipc-concordant="H03C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C7/027</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></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03C7/04" definition-exists="true" ipc-concordant="H03C7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Polarisation of transmitted wave being modulated </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03C7/022</class-ref> takes precedence</text></reference></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="H03C99/00" definition-exists="true" ipc-concordant="H03C99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C99/00</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="H03C200/00" date-revised="2013-01-01" status="published"><classification-symbol>H03C2200/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H03C200/00" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03C2200/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to details of modulators or modulation methods covered by <class-ref scheme="cpc">H03C</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="H03C200/0004" 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>H03C2200/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements of modulators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03C200/0008" 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>H03C2200/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Variable capacitors, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor</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="H03C200/0012" 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>H03C2200/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emitter or source coupled transistor pairs or long tail pairs</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="H03C200/002" 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>H03C2200/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filters with particular characteristics</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="H03C200/0025" 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>H03C2200/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gilbert multipliers</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="H03C200/0029" 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>H03C2200/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory circuits, e.g. ROMs, RAMs, EPROMs, latches, shift registers</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="H03C200/0033" 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>H03C2200/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmission lines, e.g. striplines, microstrips or coplanar lines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03C200/0037" 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>H03C2200/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Functional aspects of modulators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03C200/0041" 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>H03C2200/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration of modulators</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="H03C200/0045" 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>H03C2200/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulse width, duty cycle or on/off ratio</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="H03C200/005" 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>H03C2200/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modulation sensitivity</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03C200/0054" 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>H03C2200/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filtering of the input modulating signal for obtaining a constant sensitivity of frequency modulation</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="H03C200/0058" 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>H03C2200/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quadrature arrangements</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="H03C200/0062" 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>H03C2200/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lowering the supply voltage and saving power</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="H03C200/0066" 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>H03C2200/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reduction of carrier leakage or the suppression of the carrier</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="H03C200/007" 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>H03C2200/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one sideband wholly or partially suppressed</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="H03C200/0075" 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>H03C2200/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>FM modulation down to DC</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="H03C200/0079" 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>H03C2200/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measures to linearise modulation or reduce distortion of modulation characteristics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03C200/0083" 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>H03C2200/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Predistortion of input modulating signal to obtain a linear modulation characteristic</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="H03C200/0087" 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>H03C2200/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measures to address temperature induced variations of modulation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03C200/0091" 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>H03C2200/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by stabilising the temperature</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="H03C200/0095" 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>H03C2200/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by compensating temperature induced variations</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |