H03JTUNING RESONANT CIRCUITSSELECTING RESONANT CIRCUITSThis subclass covers also the control of tuning, including the combined control of tuning and other functions, e.g. combinations of tuning control and volume control, combinations of control of local oscillator and of supplementary resonant circuits.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. H03J1/00 H03J1/00Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in generalGroups H03J1/14, H03J1/16 take precedence over groups H03J1/08 - H03J1/12.
This Note corresponds to IPC Note (1) relating to H03J1/08 - H03J1/12. H03J1/0008using a central processing unit, e.g. a microprocessor digital tuning in general H03J5/0245 H03J1/0016Indicating arrangements digital indication of tuning in general H03J1/048 H03J1/0025in a remote control unit remote control tuning in general H03J9/00 H03J1/0033for voltage synthesis with a D/A converter H03J1/0041for frequency synthesis with counters or frequency dividers H03J1/005in a loop H03J1/0058provided with channel identification means arrangements for monitoring the use made of broadcast services H04H60/31 H03J1/0066with means for analysing the received signal strength H03J1/0083 takes precedence H03J1/0075where the receiving frequencies of the stations are stored in a permanent memory, e.g. ROM H03J1/0083using two or more tuners H03J1/0091provided with means for scanning over a band of frequencies H03J1/0058 takes precedence H03J1/02Indicating arrangements indicating correct tuning H03J3/12 H03J1/025with voiced announcement H03J1/04with optical indicating means H03J1/041Pointers, markers, or the like, for tuning dials; Folding dials H03J1/042Means insuring a precise reading of the dial, e.g. special scale, local illumination possibly temporary, luminous point moving with the pointer H03J1/044Illumination of the tuning dial; On and off switching of the illumination; Circuits related with illumination H03J1/045Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like H03J1/047using electronic means, e.g. LED's display of electronic variables in general G01R13/00, for discontinuous display G01R13/404 H03J1/048with digital indication using a microprocessor H03J1/0016 H03J1/06Driving or adjusting arrangementscombined with other driving or adjusting arrangements, e.g. of gain control H03J1/063Special arrangements taken in correlation with the wear; Suppressing backlash; Locking in a desired position H03J1/066Constructional details regarding potentiometric setting of voltage or current variable reactances H03J1/08Toothed-gear driveWorm drive H03J1/10Rope driveChain drive H03J1/12Friction drive H03J1/14Special arrangements for fine and coarse tuning H03J1/16Single control means independently performing two or more functions H03J1/18Control by auxiliary power H03J1/182using a ring of magnets or the like H03J1/185the auxiliary power producing an adjustment dependent on the current intensity H03J1/187the auxiliary power balancing automatically a Wheatstone bridge or the like, that has been unbalanced by the controlling device H03J1/20the auxiliary power being switched on as long as controlling current is switched on H03J1/22with stepping arrangements actuated by control pulses H03J3/00Continuous tuning H03J7/00, H03J9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J5/00 H03J3/02Details H03J3/04Arrangements for compensating for variations of physical values, e.g. temperature H03J3/06Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges H03J3/08by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter H03J3/10Circuit arrangements for fine tuning, e.g. bandspreading H03J3/12Electrically-operated arrangements for indicating correct tuning H03J3/14Visual indication, e.g. magic eye H03J3/16Tuning without displacement of reactive element, e.g. by varying permeability H03J3/18by discharge tube or semiconductor device simulating variable reactance H03J3/185with varactors, i.e. voltage variable reactive diodes H03J3/20of single resonant circuit by varying inductance only or capacitance only H03J3/22of single resonant circuit by varying inductance and capacitance simultaneously H03J3/24of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning H03J3/26the circuits being coupled so as to form a bandpass filter H03J3/28of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range H03J3/30Arrangements for ensuring tracking with variable inductors H03J3/32Arrangements for ensuring tracking with variable capacitors H03J5/00Discontinuous tuningSelecting predetermined frequenciesSelecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner H03J7/00, H03J9/00 take precedence; for bandspreading H03J3/10 H03J5/02with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings H03J5/0209Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of non preset values H03J5/0218Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values H03J5/0227using a counter H03J5/0236with possibility to skip over certain counter positions, i.e. channel skipping, or scanning the counter position with a variable frequency rate H03J5/0245Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form microprocessor tuning H03J1/0008 H03J5/0254the digital values being transfered to a D/A converter H03J5/0263the digital values being held in an auxiliary non erasable memory H03J5/0272the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer H03J5/0281the digital values being held in an auxiliary non erasable memory H03J5/029with channel skipping capability H03J5/04operated by hand H03J5/06Settings determined by single indexing means with snap action H03J5/08Settings determined by a number of separately-actuated positioning means H03J5/10Settings determined by a number of positioning means mounted on a common support, e.g. turret tuner, which is adjustable to desired positions, a different positioning means being in operation in each position H03J5/12Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings H03J5/14operated by auxiliary power H03J5/143Settings determined by a number of positioning means mounted on a common support, e.g. turret tuner, which is adjustable to determined positions, a different positioning means being in operation in each position H03J5/146Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached H03J5/16Settings determined by a number of separate positioning means actuated by hand H03J5/18Settings determined by a number of separate positioning means actuated by electromagnets H03J5/20Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power H03J5/22Settings determined by a number of separately actuated driving means which adjust the tuning element directly to desired settings H03J5/24with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection H03J5/242used exclusively for band selection H03J5/244using electronic means H03J5/246using electronic means H03J5/244 takes precedence H03J5/248using electromechanical means H03J5/26operated by hand H03J5/28Tuning circuits or elements supported on a revolving member with contacts arranged in a plane perpendicular to the axis H03J5/30Tuning circuits or elements supported on a revolving member with contacts arranged in lines parallel to the axis H03J5/32Stationary tuning circuits or elements selected by push-button H03J7/00Automatic frequency controlAutomatic scanning over a band of frequencies H03J7/02Automatic frequency control H03J7/18 takes precedence H03J7/023Neutralization of the automatic frequency correction during a tuning change H03J7/026Means preventing a wrong working of the automatic frequency correction in case of fading or bad signal/noise ratio H03J7/04where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant H03J7/042with reactance tube H03J7/045Modification of automatic frequency control sensitivity or linearising automatic frequency control operation; Modification of the working range H03J7/10 takes precedence H03J7/047Automatic frequency control using an auxiliary signal, e.g. low frequency scanning of the locking range or superimposing a special signal on the input signal H03J7/06using counters or frequency dividers H03J7/065the counter or frequency divider being used in a phase locked loop H03J7/08using varactors, i.e. voltage variable reactive diodes H03J7/06 takes precedence H03J7/10Modification of automatic frequency control sensitivity or linearising automatic frequency control operation H03J7/12Combination of automatic frequency control voltage with stabilised varactor supply voltage H03J7/14Controlling the magnetic state of inductor cores H03J7/06 takes precedence H03J7/16where the frequency control is accomplished by mechanical means, e.g. by a motor H03J7/18Automatic scanning over a band of frequencies H03J7/183combined with selection between different stations transmitting the same programm, e.g. by analysis of the received signal strength H03J7/186using two or more tuners H03J7/20where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element H03J7/183 takes precedence H03J7/22in which an automatic frequency control circuit is brought into action after the scanning action has been stopped H03J7/24 takes precedence H03J7/24using varactors, i.e. voltage variable reactive diodes H03J7/28 takes precedence H03J7/26in which an automatic frequency control circuit is brought into action after the scanning action has been stopped H03J7/28using counters or frequency dividers H03J7/285the counter or frequency divider being used in a phase locked loop H03J7/30where the scanning is accomplished by mechanical means, e.g. by a motor H03J7/305in which an automatic frequency control circuit is brought in action after the scanning action has been stopped H03J7/32with simultaneous display of received frequencies, e.g. panoramic receivers H03J9/00Remote-control of tuned circuitsCombined remote-control of tuning and other functions, e.g. brightness, amplification mechanical remote-control arrangements H03J1/00 ; using a microprocessor H03J1/0025; constructional details of remote control switching devices H01H9/0235 H03J9/002comprising one or more tuning stages separated from the rest of a receiver H03J9/005using non-electrical means without push-button control, e.g. pneumatic, hydraulic or sound wave transmission, Bowden cables H03J9/007by voltages or currents with different frequencies or phases H03J9/02using radio transmissionusing near-field transmission H03J9/04using ultrasonic, sonic or infrasonic waves H03J9/06using electromagnetic waves other than radio waves, e.g. light H03J2200/00 H03J2200/00Indexing scheme relating to tuning resonant circuits and selecting resonant circuits H03J2200/01Circuitry controlling the selecting or switching action H03J2200/02Algorithm used as input for AFC action alignment receiver H03J2200/03Alignment of a receiver during fabrication H03J2200/04Alignment of a transmitter during fabrication H03J2200/05Alignment of transmitter with a receiver, after fabrication H03J2200/06Tuning of antenna H03J2200/07Calibration of receivers, using quartz crystal oscillators as reference H03J2200/08Calibration of receivers, in particular of a band pass filter H03J2200/09Calibration of oscillator in receiver, using an external carrier frequency as reference H03J2200/10Tuning of a resonator by means of digitally controlled capacitor bank H03J2200/11Cellular receiver, e.g. GSM, combined with a GPS receiver H03J2200/12Radio receiver combined with a GPS receiver H03J2200/13Television receiver combined with a GPS receiver H03J2200/14Tunable filter in receiver contributing to image rejection H03J2200/15Tuning of resonator by means of digitally controlled inductor bank H03J2200/16Interpolation of control values for varicaps H03J2200/17Elimination of interference caused by harmonics of local oscillator H03J2200/18Tuning of a master filter in order to tune its slave filter H03J2200/19Resonator in MEMS technology H03J2200/20Radio receiver with possibility to choose a station with a certain program style H03J2200/21Television receiver with possibility to choose a station with a certain program style H03J2200/22Remote control device controlling cursor and/or including a cursor detecting device H03J2200/23Remote control device with display showing data to be transmitted to the controlled apparatus H03J2200/24Remote control device with display showing program content H03J2200/25Remote control device with display H03J2200/26Remote control device with touch screen display H03J2200/27Adjusting the seek sensitivity of a scanning or sweeping receiver H03J2200/28Automatic self-alignment of a receiver H03J2200/29Self-calibration of a receiver H03J2200/30Radio receiver with speech synthesis ability, used for conveying information that is shown on the display H03J2200/31Several sweeping or scanning speeds H03J2200/32Tuning of tracking filter H03J2200/33Tuning of filter by controlling transconductance H03J2200/34Tuning of oscillator by controlling transconductance H03J2200/35Inductance tunable by switching in/out parts of the inductor H03J2200/36Circuit arrangements for, e.g. increasing the tuning range, linearizing the voltage-capacitance relationship, lowering noise, constant slope in different bands H03J2200/37Control voltage applied to the anode of the varicap H03J2200/38Control voltage applied to the cathode of the varicap H03J2200/39Variable capacitors implemented using microelectro-mechanical systems [MEMS] H03J2200/40Conversion to a zero or near-zero intermediate frequency