IPC-Stelle: H03G 99/00 [Version 2017.01]

SymbolTypTitel
HSKELECTRICITY
H03KLBASIC ELECTRONIC CIRCUITRY
H03GUKLCONTROL OF AMPLIFICATION (impedance networks, e.g. attenuators, H03H; control of transmission in lines H04B 3/04)
H03G 1/00HGRDetails of arrangements for controlling amplification [1, 2006.01]
H03G 1/02UGR1
.Remote control of amplification, tone, or bandwidth (remote control in general G05, G08; combined with remote tuning or selection of resonant circuits H03J) [1, 2006.01]
H03G 1/04UGR1
.Modifications of control circuit to reduce distortion caused by control (modifications to reduce influence of variations of internal impedance of amplifying elements caused by control H03F 1/08) [1, 2006.01]
H03G 3/00HGRGain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) [1, 2006.01]
H03G 3/02UGR1
.Manually-operated control [1, 2006.01]
H03G 3/04UGR2
. .in untuned amplifiers [1, 2006.01]
H03G 3/06UGR3
. . .having discharge tubes [1, 2006.01]
H03G 3/08UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 3/10UGR3
. . .having semiconductor devices [1, 2006.01]
H03G 3/12UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 3/14UGR2
. .in frequency-selective amplifiers [1, 2006.01]
H03G 3/16UGR3
. . .having discharge tubes [1, 2006.01]
H03G 3/18UGR3
. . .having semiconductor devices [1, 2006.01]
H03G 3/20UGR1
.Automatic control (combined with volume compression or expansion H03G 7/00) [1, 2006.01]
H03G 3/22UGR2
. .in amplifiers having discharge tubes [1, 2006.01]
H03G 3/24UGR3
. . .Control dependent upon ambient noise level or sound level [1, 2006.01]
H03G 3/26UGR3
. . .Muting amplifier when no signal is present [1, 2006.01]
H03G 3/28UGR4
. . . .in frequency-modulation receivers [1, 2006.01]
H03G 3/30UGR2
. .in amplifiers having semiconductor devices [1, 2006.01]
H03G 3/32UGR3
. . .the control being dependent upon ambient noise level or sound level [1, 2006.01]
H03G 3/34UGR3
. . .Muting amplifier when no signal is present [1, 2006.01]
H03G 5/00HGRTone control or bandwidth control in amplifiers [1, 2006.01]
H03G 5/02UGR1
.Manually-operated control (variable bandpass or bandstop filters H03H 7/12) [1, 2006.01]
H03G 5/04UGR2
. .in untuned amplifiers [1, 2006.01]
H03G 5/06UGR3
. . .having discharge tubes [1, 2006.01]
H03G 5/08UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 5/10UGR3
. . .having semiconductor devices [1, 2006.01]
H03G 5/12UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 5/14UGR2
. .in frequency-selective amplifiers [1, 2006.01]
H03G 5/16UGR1
.Automatic control [1, 2006.01]
H03G 5/18UGR2
. .in untuned amplifiers [1, 2006.01]
H03G 5/20UGR3
. . .having discharge tubes [1, 2006.01]
H03G 5/22UGR3
. . .having semiconductor devices [1, 2006.01]
H03G 5/24UGR2
. .in frequency-selective amplifiers [1, 2006.01]
H03G 5/26UGR3
. . .having discharge tubes [1, 2006.01]
H03G 5/28UGR3
. . .having semiconductor devices [1, 2006.01]
H03G 7/00HGRVolume compression or expansion in amplifiers [1, 2006.01]
H03G 7/02UGR1
.having discharge tubes [1, 2006.01]
H03G 7/04UGR2
. .incorporating negative feedback [1, 2006.01]
H03G 7/06UGR1
.having semiconductor devices [1, 2006.01]
H03G 7/08UGR2
. .incorporating negative feedback [1, 2006.01]
H03G 9/00HGRCombinations of two or more types of control, e.g. gain control and tone control [1, 2006.01]
H03G 9/02UGR1
.in untuned amplifiers (combined tone controls for low and high frequencies H03G 5/00) [1, 2006.01]
H03G 9/04UGR2
. .having discharge tubes [1, 2006.01]
H03G 9/06UGR3
. . .for gain control and tone control [1, 2006.01]
H03G 9/08UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 9/10UGR3
. . .for tone control and volume expansion or compression [1, 2006.01]
H03G 9/12UGR2
. .having semiconductor devices [1, 2006.01]
H03G 9/14UGR3
. . .for gain control and tone control [1, 2006.01]
H03G 9/16UGR4
. . . .incorporating negative feedback [1, 2006.01]
H03G 9/18UGR3
. . .for tone control and volume expansion or compression [1, 2006.01]
H03G 9/20UGR1
.in frequency-selective amplifiers [1, 2006.01]
H03G 9/22UGR2
. .having discharge tubes [1, 2006.01]
H03G 9/24UGR2
. .having semiconductor devices [1, 2006.01]
H03G 9/26UGR1
.in untuned amplifying stages as well as in frequency-selective amplifying stages (gain control in both stages H03G 3/00; tone control or bandwidth control H03G 5/00) [1, 2006.01]
H03G 9/28UGR2
. .all amplifying stages having discharge tubes [1, 2006.01]
H03G 9/30UGR2
. .all amplifying stages having semiconductor devices [1, 2006.01]
H03G 11/00HGRLimiting amplitude; Limiting rate of change of amplitude [1, 2006.01]
H03G 11/02UGR1
.by means of diodes (H03G 11/04, H03G 11/06, H03G 11/08 take precedence) [1, 2006.01]
H03G 11/04UGR1
.Limiting level dependent on strength of signal; Limiting level dependent on strength of carrier on which signal is modulated [1, 2006.01]
H03G 11/06UGR1
.Limiters of angle-modulated signals; such limiters combined with discriminators (discriminators having an inherent limiting action H03D 3/00) [1, 2006.01]
H03G 11/08UGR1
.Limiting rate of change of amplitude [1, 2006.01]
H03G 99/00HGRSubject matter not provided for in other groups of this subclass [2006.01]