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Class Information
Number: 330/132
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Frequency selective means to select control signal from amplifier channel
Description: Subject matter wherein the "means to control the bias voltage" is derived from the electrical signal channel through a frequency selective means.










Patents under this class:

Patent Number Title Of Patent Date Issued
8351874 System and method for adaptive antenna impedance matching Jan. 8, 2013
8145149 Operating a voltage regulator at a switching frequency selected to reduce spurious signals Mar. 27, 2012
7549157 Automatic gain-setting in relaying device Jun. 16, 2009
7429891 Method and system for low noise amplifier (LNA) gain adjustment through narrowband received signal strength indicator (NRSSI) Sep. 30, 2008
7148747 Apparatus for automatically controlling a gain of a power amplifier and associated methods Dec. 12, 2006
6954623 Load variation tolerant radio frequency (RF) amplifier Oct. 11, 2005
6853242 Power supply based audio compression for digital audio amplifier Feb. 8, 2005
6812789 RF power amplifier digital gain flattening over multiband frequencies Nov. 2, 2004
6791406 Power servo-loop, an RF signal amplifier circuit, and an RF signal transmitter fitted with such a circuit Sep. 14, 2004
6765436 Power supply based audio compression for digital audio amplifier Jul. 20, 2004
6741128 Distortion canceling circuit May. 25, 2004
6683496 System and method for minimizing dissipation in RF power amplifiers Jan. 27, 2004
6608523 System and method for producing a pilot signal in a distortion reduction system Aug. 19, 2003
6545536 Biasing circuit for VGS drift and thermal compensation of a power device Apr. 8, 2003
6525605 Power amplifier system having frequency and amplifier failure compensation Feb. 25, 2003
6304145 Large signal amplifier gain compensation circuit Oct. 16, 2001
6246285 AGC circuit based on a peak detection system Jun. 12, 2001
6147555 Amplification system having mask detection Nov. 14, 2000
6111461 High frequency amplifier circuit Aug. 29, 2000
6072824 Circuit arrangement for reducing intermodulation in a bandpass filter system Jun. 6, 2000
5990746 Amplifier system Nov. 23, 1999
5923215 Linearized amplifier Jul. 13, 1999
5814752 Musical instrument crossover circuits and method of using same Sep. 29, 1998
5712593 Linear power amplifier with distortion detection Jan. 27, 1998
5694082 Circuit arrangement for determining intermodulation products Dec. 2, 1997
5546050 Radio frequency bus leveling system Aug. 13, 1996
5220287 Voice processing apparatus Jun. 15, 1993
4468630 Wide-band amplifier for driving capacitive load Aug. 28, 1984
4293937 Borehole acoustic telemetry system Oct. 6, 1981
4281295 Noise reducing apparatus Jul. 28, 1981
4219780 Gain controlled amplifier circuits Aug. 26, 1980
4185248 Input level supervisory system for level regulator Jan. 22, 1980
4114115 Compandor apparatus Sep. 12, 1978
4101849 Adaptive filter Jul. 18, 1978
3978422 Broadband automatic gain control amplifier Aug. 31, 1976











 
 
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