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Class Information
Number: 330/138
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Bias controlled by biased rectifier or discharge device
Description: Subject matter wherein the "bias voltage control means" includes a rectifier or discharge device which is biased in such a manner that the rectifier or discharge device will not conduct until a predetermined voltage is reached, which imparts to the control means a "voltage delay" action and wherein the minimum voltage at which bias control begins may be predetermined.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8570104 Amplifier assembly having controlled return of power loss Oct. 29, 2013
7512387 Method and control system for controlling the output power of an RF amplifier system Mar. 31, 2009
7167718 Transmission power control apparatus, transmission power control method, and mobile station Jan. 23, 2007
7116174 Base current compensation circuit for a bipolar junction transistor Oct. 3, 2006
6747515 Circuit for automatic regulation of a differential amplifier's gain Jun. 8, 2004
6625470 Transmitter Sep. 23, 2003
6529072 Predistortion-based amplifier, transmitter and envelope detector Mar. 4, 2003
6297698 Circuit for automatic regulation of a differential amplifier's gain Oct. 2, 2001
6047167 Output power control device Apr. 4, 2000
5805022 Circuit for automatically regulating the gain of a differential amplifier Sep. 8, 1998
5696833 Hearing aid having externally controlled amplifier gain and method of using same Dec. 9, 1997
5672999 Audio amplifier clipping avoidance method and apparatus Sep. 30, 1997
5606285 Power control circuit for use with transmitter Feb. 25, 1997
5561288 Biasing voltage cancellation circuit having a plurality of switches serially connected to a capacitor Oct. 1, 1996
5548833 Data independent automatic gain control circuit for telecommunication applications Aug. 20, 1996
5507023 Receiver with an AGC circuit capable of expanding a dynamic range Apr. 9, 1996
5483198 Method and apparatus for controlling amplifier power Jan. 9, 1996
5434539 Unity-gain linear-fader control for VCA Jul. 18, 1995
5424679 +12dB gain linear-fader control for VCA Jun. 13, 1995
5412341 Power control apparatus and method for a radio frequency amplifier May. 2, 1995
5404115 Variable gain amplifier Apr. 4, 1995
5384547 Apparatus and method for attenuating a multicarrier input signal of a linear device Jan. 24, 1995
5363057 Control device for power amplifier Nov. 8, 1994
5337006 Output level control circuit for use in RF transmitter Aug. 9, 1994
5302913 Power amplifying circuit capable of producing an output signal having a desired waveform Apr. 12, 1994
5179353 Power control circuit used for both analog/digital dual mode Jan. 12, 1993
5159283 Power amplifier Oct. 27, 1992
5132634 Amplifier circuit with envelope smoothing Jul. 21, 1992
4870372 AGC delay on an integrated circuit Sep. 26, 1989
4835484 Gain control circuit for suppressing Larsen effect in a loudspeaker telephone May. 30, 1989
4691172 MOS Switched capacitor automatic gain control circuit Sep. 1, 1987
4581589 Apparatus for avoiding clipping of amplifier Apr. 8, 1986
4570127 Automatic gain control circuit for burst signal communication system Feb. 11, 1986
4495410 Light receiving automatic gain control circuit Jan. 22, 1985
4476437 System for detecting abnormal condition of high frequency output signal in its power level Oct. 9, 1984
4398158 Dynamic range expander Aug. 9, 1983
4393354 Crossover circuit for use in automatic gain control systems Jul. 12, 1983
4380737 Fast AGC slew circuit Apr. 19, 1983
4376916 Signal compression and expansion system Mar. 15, 1983
4307348 Automatic gain control circuit Dec. 22, 1981
4246543 Delayed AGC circuit Jan. 20, 1981
4233566 Distortion free power limiting and clipping prevention circuit Nov. 11, 1980
4224578 Gain control Sep. 23, 1980
4210882 Delay network comprising a chain of all-pass sections Jul. 1, 1980
4206415 Audio amplitude detector circuit Jun. 3, 1980
4204172 Automatic gain control device for a single-sideband receiver May. 20, 1980
4182993 Signal amplitude compression system Jan. 8, 1980
4179666 Method and circuit for controlling the output signal of a variable control circuit Dec. 18, 1979
4160488 Extended width sensor Jul. 10, 1979
4147900 Telephone network protective coupler Apr. 3, 1979

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