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H03C 1/00
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Amplitude modulation |
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H03C 1/02
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Amplitude modulation - Details |
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H03C 1/04
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Means in, or combined with, modulating stage for reducing angle modulation |
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H03C 1/06
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Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator |
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H03C 1/08
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Amplitude modulation by means of variable impedance element |
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H03C 1/10
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Amplitude modulation by means of variable impedance element the element being a current-dependent inductor |
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H03C 1/12
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Amplitude modulation by means of variable impedance element the element being a voltage-dependent capacitor |
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H03C 1/14
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Amplitude modulation by means of variable impedance element the element being a diode |
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H03C 1/16
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Amplitude modulation by means of discharge device having at least three electrodes |
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H03C 1/18
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Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid |
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H03C 1/20
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Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode |
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H03C 1/22
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Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to same grid |
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H03C 1/24
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Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to different grid |
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H03C 1/26
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Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to cathode |
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H03C 1/28
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Amplitude modulation by means of transit-time tube |
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H03C 1/30
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Amplitude modulation by means of transit-time tube by means of a magnetron |
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H03C 1/32
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Amplitude modulation by deflection of electron beam in discharge tube |
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H03C 1/34
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Amplitude modulation by means of light-sensitive element |
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H03C 1/36
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Amplitude modulation by means of semiconductor device having at least three electrodes |
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H03C 1/38
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Amplitude modulation by means of semiconductor device having at least three electrodes carrier applied to base of a transistor |
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H03C 1/40
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Amplitude modulation by means of semiconductor device having at least three electrodes carrier applied to base of a transistor modulating signal applied to collector |
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H03C 1/42
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Amplitude modulation by means of semiconductor device having at least three electrodes carrier applied to base of a transistor modulating signal applied to base |
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H03C 1/44
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Amplitude modulation by means of semiconductor device having at least three electrodes carrier applied to base of a transistor modulating signal applied to emitter |
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H03C 1/46
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Modulators with mechanically-driven or acoustically-driven parts |
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H03C 1/48
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Amplitude modulation by means of Hall-effect devices |
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H03C 1/50
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Amplitude modulation by converting angle modulation to amplitude modulation |
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H03C 1/52
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Modulators in which carrier or one sideband is wholly or partially suppressed |
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H03C 1/54
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Balanced modulators, e.g. bridge type, ring type or double balanced type |
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H03C 1/56
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Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only |
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H03C 1/58
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Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes |
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H03C 1/60
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Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed |
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H03C 1/62
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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 |
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H03C 3/00
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Angle modulation |
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H03C 3/02
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Angle modulation - Details |
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H03C 3/04
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Means in, or combined with, modulating stage for reducing amplitude modulation |
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H03C 3/06
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Means for changing frequency deviation |
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H03C 3/08
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Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator |
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H03C 3/09
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Modifications of modulator for regulating the mean frequency |
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H03C 3/10
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Angle modulation by means of variable impedance |
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H03C 3/12
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Angle modulation by means of variable impedance by means of a variable reactive element |
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H03C 3/14
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Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit |
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H03C 3/16
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Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit in which the active element simultaneously serves as the active element of an oscillator |
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H03C 3/18
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Angle modulation by means of variable impedance by means of a variable reactive element the element being a current-dependent inductor |
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H03C 3/20
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Angle modulation by means of variable impedance by means of a variable reactive element the element being a voltage-dependent capacitor |
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H03C 3/22
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Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode |
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H03C 3/24
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Angle modulation by means of variable impedance by means of a variable resistive element, e.g. tube |
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H03C 3/26
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Angle modulation by means of variable impedance by means of a variable resistive element, e.g. tube comprising two elements controlled in push-pull by modulating signal |
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H03C 3/28
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Angle modulation by means of variable impedance using variable impedance driven mechanically or acoustically |
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H03C 3/30
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Angle modulation by means of transit-time tube |
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H03C 3/32
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Angle modulation by means of transit-time tube the tube being a magnetron |
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H03C 3/34
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Angle modulation by deflection of electron beam in discharge tube |
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H03C 3/36
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Angle modulation by means of light-sensitive element |
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H03C 3/38
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Angle modulation by converting amplitude modulation to angle modulation |
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H03C 3/40
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Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated |
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H03C 3/42
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Angle modulation by means of electromechanical devices |
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H03C 5/00
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Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal |
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H03C 5/02
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Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal by means of transit-time tube |
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H03C 5/04
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Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal by means of transit-time tube the tube being a magnetron |
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H03C 5/06
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Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal by deflection of electron beam in discharge tube |
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H03C 7/00
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Modulating electromagnetic waves |
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H03C 7/02
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Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas |
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H03C 7/04
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Polarisation of transmitted wave being modulated |
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H03C 99/00
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Subject matter not provided for in other groups of this subclass |
