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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 |
| 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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