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Class Information
Number: 330/130
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Bias controlled by separate external control source
Description: Subject matter wherein the "means to control the bias voltage" includes a source of control voltage from a system outside the amplifier system itself.










Patents under this class:

Patent Number Title Of Patent Date Issued
8600442 Power recovery circuit based on partial standing waves Dec. 3, 2013
8351874 System and method for adaptive antenna impedance matching Jan. 8, 2013
8219049 Generating a process and temperature tracking bias voltage Jul. 10, 2012
7808322 System and method for modifying output power of an information communication system Oct. 5, 2010
7386075 Apparatus for and method of optimizing the performance of a radio frequency receiver in the presence of interference Jun. 10, 2008
7346318 High frequency power amplifier component and radio communication system Mar. 18, 2008
7193459 Power amplifier control technique for enhanced efficiency Mar. 20, 2007
7167045 System and method for modifying output power of an information communication system Jan. 23, 2007
7135921 Differential circuit, amplifier circuit, driver circuit and display device using those circuits Nov. 14, 2006
7116174 Base current compensation circuit for a bipolar junction transistor Oct. 3, 2006
6934520 CMOS current mode RF detector and method Aug. 23, 2005
6819226 Systems and methods for energy storage in land-based telemetry applications Nov. 16, 2004
6801757 Circuit configuration for matching an amplifier to a radio-frequency line, and use of the circuit configuration Oct. 5, 2004
6788123 Unity gain interpolator for delay locked loops Sep. 7, 2004
6597925 Transmitter circuit with frequency self-optimization Jul. 22, 2003
6542029 Variable-slope variable-gain amplifier Apr. 1, 2003
6509722 Dynamic input stage biasing for low quiescent current amplifiers Jan. 21, 2003
5987308 Portable terminal having a shared antenna with reduced standing wave ratio Nov. 16, 1999
5878331 Integrated circuit Mar. 2, 1999
5406225 Bias control circuit for radio-frequency power amplifier Apr. 11, 1995
5337006 Output level control circuit for use in RF transmitter Aug. 9, 1994
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
5229731 Power amplifying circuit capable of switching amplification mode Jul. 20, 1993
5093667 T/R module with error correction Mar. 3, 1992
4924191 Amplifier having digital bias control apparatus May. 8, 1990
4754231 Automatic control circuitry for a signal power amplifier Jun. 28, 1988
4644293 RF pulse modulated amplifier having conduction angle control Feb. 17, 1987
4194164 Variable frequency sources Mar. 18, 1980
4189973 Electronic expression control Feb. 26, 1980
4047377 Sleep-inducing/interrupting audio system Sep. 13, 1977
3978421 Electrical musical instrument amplifier having improved tremolo circuit, improved reverberation control, and power reduction circuit for distortion mode operation Aug. 31, 1976











 
 
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