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Class Information
Number: 330/137
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Oscillator supplies or controls bias
Description: Subject matter wherein the bias voltage control means includes an oscillator which may be itself controlled by a bias voltage means and from which a signal amplifier bias voltage is derived, or from which a control voltage, usually constant, is derived.










Patents under this class:

Patent Number Title Of Patent Date Issued
8704607 Pulse modulated RF power control method and pulse modulated RF power supply device Apr. 22, 2014
8624669 DC offset compensation Jan. 7, 2014
8416019 System and method for interpolating digitally-controlled amplifier gain Apr. 9, 2013
8258870 System and method for digital control of amplifier gain with reduced zipper noise Sep. 4, 2012
8145149 Operating a voltage regulator at a switching frequency selected to reduce spurious signals Mar. 27, 2012
7567641 Sample rate conversion systems with an independent internal oscillator Jul. 28, 2009
7512387 Method and control system for controlling the output power of an RF amplifier system Mar. 31, 2009
6750708 Miniaturized buffer amplifier and electronic circuit unit using same Jun. 15, 2004
6608524 Automatic gain control circuit Aug. 19, 2003
6570443 Amplitude control of an alternating signal generated by an electronic device such as an oscillator circuit May. 27, 2003
6087901 Tuning amplifier Jul. 11, 2000
5963087 Gain control circuit and method for providing gain control of a variable amplifier using a pilot signal Oct. 5, 1999
5960333 Circuitry and method for power calibration Sep. 28, 1999
5874860 High frequency amplifier and control Feb. 23, 1999
5784689 Output control circuit for transmission power amplifying circuit Jul. 21, 1998
5714908 Power correction method and circuit Feb. 3, 1998
5327583 Using a clock signal generated by a microcomputer for providing a negative bias voltage to a galium arsenide field effect transistor in a high frequency amplifier of the device Jul. 5, 1994
5196806 Output level control circuit for use in RF power amplifier Mar. 23, 1993
5194823 Modulation means for an RF power amplifier Mar. 16, 1993
5175749 Apparatus and method for DC offset correction in a receiver Dec. 29, 1992
4996500 Automatic control system Feb. 26, 1991
4994757 Efficiency improvement of power amplifiers Feb. 19, 1991
4873492 Amplifier with modulated resistor gain control Oct. 10, 1989
4670719 Digitally processing automatic gain control circuit Jun. 2, 1987
4591809 High frequency power source May. 27, 1986
4570127 Automatic gain control circuit for burst signal communication system Feb. 11, 1986
4514701 Automatic level control circuit Apr. 30, 1985
4350962 R.F. switched amplifier and A.M. modulator Sep. 21, 1982
4194164 Variable frequency sources Mar. 18, 1980











 
 
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