IPC-Stelle: H03C 3/38 [Version 2006.01]

SymbolTypTitel
HSKSECTION H — ELECTRICITY
H03KLBASIC ELECTRONIC CIRCUITRY
H03CUKLMODULATION (measuring, testing G01R; masers, lasers H01S; modulators specially adapted for use in dc amplifiers H03F 3/38; modulating pulses H03K 7/00; so-called modulators capable only of switching between predetermined states of amplitude, frequency or phase H03K 17/00, H04L; coding, decoding or code conversion, in general H03M; synchronous modulators specially adapted for colour television H04N 9/65)
H03C 1/00HGRAmplitude modulation (H03C 5/00, H03C 7/00 take precedence)
H03C 1/02UGR1
.Details
H03C 1/04UGR2
. .Means in, or combined with, modulating stage for reducing angle modulation
H03C 1/06UGR2
. .Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
H03C 1/08UGR1
.by means of variable impedance element (H03C 1/28-H03C 1/34, H03C 1/46-H03C 1/52, H03C 1/62 take precedence)
H03C 1/10UGR2
. .the element being a current-dependent inductor
H03C 1/12UGR2
. .the element being a voltage-dependent capacitor
H03C 1/14UGR2
. .the element being a diode
H03C 1/16UGR1
.by means of discharge device having at least three electrodes (H03C 1/28-H03C 1/34, H03C 1/50, H03C 1/52, H03C 1/62 take precedence)
H03C 1/18UGR2
. .carrier applied to control grid
H03C 1/20UGR3
. . .modulating signal applied to anode
H03C 1/22UGR3
. . .modulating signal applied to same grid
H03C 1/24UGR3
. . .modulating signal applied to different grid
H03C 1/26UGR3
. . .modulating signal applied to cathode
H03C 1/28UGR1
.by means of transit-time tube
H03C 1/30UGR2
. .by means of a magnetron
H03C 1/32UGR1
.by deflection of electron beam in discharge tube
H03C 1/34UGR1
.by means of light-sensitive element
H03C 1/36UGR1
.by means of semiconductor device having at least three electrodes (H03C 1/34, H03C 1/50, H03C 1/52, H03C 1/62 take precedence)
H03C 1/38UGR2
. .carrier applied to base of a transistor
H03C 1/40UGR3
. . .modulating signal applied to collector
H03C 1/42UGR3
. . .modulating signal applied to base
H03C 1/44UGR3
. . .modulating signal applied to emitter
H03C 1/46UGR1
.Modulators with mechanically- or acoustically-driven parts
H03C 1/48UGR1
.by means of Hall-effect devices
H03C 1/50UGR1
.by converting angle modulation to amplitude modulation (H03C 1/28-H03C 1/34, H03C 1/46, H03C 1/48 take precedence)
H03C 1/52UGR1
.Modulators in which carrier or one sideband is wholly or partially suppressed (H03C 1/28-H03C 1/34, H03C 1/46, H03C 1/48 take precedence)
H03C 1/54UGR2
. .Balanced modulators, e.g. bridge type, ring type, double balanced type
H03C 1/56UGR3
. . .comprising variable two-pole elements only
H03C 1/58UGR4
. . . .comprising diodes
H03C 1/60UGR2
. .with one sideband wholly or partially suppressed
H03C 1/62UGR1
.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 (H03C 1/28-H03C 1/34, H03C 1/46, H03C 1/48 take precedence)
H03C 3/00HGRAngle modulation (H03C 5/00, H03C 7/00 take precedence)
H03C 3/02UGR1
.Details
H03C 3/04UGR2
. .Means in, or combined with, modulating stage for reducing amplitude modulation
H03C 3/06UGR2
. .Means for changing frequency deviation
H03C 3/08UGR2
. .Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
H03C 3/09UGR2
. .Modifications of modulator for regulating the mean frequency [3]
H03C 3/10UGR1
.by means of variable impedance (H03C 3/30-H03C 3/38 take precedence)
H03C 3/12UGR2
. .by means of a variable reactive element
H03C 3/14UGR3
. . .simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
H03C 3/16UGR4
. . . .in which the active element simultaneously serves as the active element of an oscillator
H03C 3/18UGR3
. . .the element being a current-dependent inductor
H03C 3/20UGR3
. . .the element being a voltage-dependent capacitor
H03C 3/22UGR3
. . .the element being a semiconductor diode, e.g. varicap diode
H03C 3/24UGR2
. .by means of a variable resistive element, e.g. tube
H03C 3/26UGR3
. . .comprising two elements controlled in push-pull by modulating signal
H03C 3/28UGR2
. .using variable impedance driven mechanically or acoustically
H03C 3/30UGR1
.by means of transit-time tube
H03C 3/32UGR2
. .the tube being a magnetron
H03C 3/34UGR1
.by deflection of electron beam in discharge tube
H03C 3/36UGR1
.by means of light-sensitive element
H03C 3/38UGR1
.by converting amplitude modulation to angle modulation
H03C 3/40UGR2
. .using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
H03C 3/42UGR1
.by means of electromechanical devices (H03C 3/28 takes precedence) [3]
H03C 5/00HGRAmplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal (H03C 7/00 takes precedence)
H03C 5/02UGR1
.by means of transit-time tube
H03C 5/04UGR2
. .the tube being a magnetron
H03C 5/06UGR1
.by deflection of electron beam in discharge tube
H03C 7/00HGRModulating electromagnetic waves (devices or arrangements for the modulation of light G02F 1/00; for generating oscillations H03B, H03K)
H03C 7/02UGR1
.in transmission line, waveguide, cavity resonator, or radiation field of aerial
H03C 7/04UGR2
. .Polarisation of transmitted wave being modulated
H03C 99/00HGRSubject matter not provided for in other groups of this subclass [2006.01]