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Class Information
Number: 330/285
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means > Having particular biasing means
Description: Subject matter having specific details or distinctive characteristics of a biasing means for applying a biasing voltage to the amplifying device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456693 |
Regulation of an amplification apparatus |
Nov. 25, 2008 |
| 7453147 |
Semiconductor device, its manufacturing method, and radio communication device |
Nov. 18, 2008 |
| 7449954 |
Fast settling power amplifier regulator |
Nov. 11, 2008 |
| 7443245 |
High frequency power amplifier circuit and electronic component for high frequency power amplifier |
Oct. 28, 2008 |
| 7443246 |
Constant current biasing circuit for linear power amplifiers |
Oct. 28, 2008 |
| 7444124 |
Adjustable segmented power amplifier |
Oct. 28, 2008 |
| 7443244 |
Method and apparatus for controlling a power amplifier supply voltage |
Oct. 28, 2008 |
| 7439806 |
Bias control circuit and method of controlling bias of RF power amplifier |
Oct. 21, 2008 |
| 7436258 |
Multi-operational amplifier system |
Oct. 14, 2008 |
| 7414479 |
Automatic bias control circuit for reduced current consumption in a linear power amplifier |
Aug. 19, 2008 |
| 7411457 |
Power amplifying semiconductor integrated circuit device for use in communication equipment |
Aug. 12, 2008 |
| 7408412 |
Power amplifier and wireless communication device |
Aug. 5, 2008 |
| 7408413 |
Circuit for accurately controlling power amplifier output power |
Aug. 5, 2008 |
| 7405625 |
Common-mode control structures and signal converter systems for use therewith |
Jul. 29, 2008 |
| 7400197 |
Gain control circuit capable of reducing change in gain due to variation of ambient temperature |
Jul. 15, 2008 |
| 7400201 |
Apparatus and method for reducing drain modulation of high power transistor |
Jul. 15, 2008 |
| 7395036 |
Semiconductor integrated circuit for high frequency power amplifier and electric components with the semiconductor integrated circuit |
Jul. 1, 2008 |
| 7394318 |
Amplifier control system |
Jul. 1, 2008 |
| 7394317 |
Amplifying circuit having bias voltage setting mechanism |
Jul. 1, 2008 |
| 7378909 |
Radio-frequency power amplifier apparatus and method of adjusting output power thereof |
May. 27, 2008 |
| 7368995 |
Power amplifier with active bias circuit |
May. 6, 2008 |
| 7368988 |
High-frequency power amplifier |
May. 6, 2008 |
| 7365604 |
RF amplifier with a bias boosting scheme |
Apr. 29, 2008 |
| 7363012 |
Transmission power control device and method thereof, computer program for transmission power control device, and radio transmitter |
Apr. 22, 2008 |
| 7362179 |
Power amplifier circuit and method thereof |
Apr. 22, 2008 |
| 7362181 |
Procedure for operating a high frequency amplifier |
Apr. 22, 2008 |
| 7358816 |
Variable gain amplifier |
Apr. 15, 2008 |
| 7358817 |
Linearized bias circuit with adaptation |
Apr. 15, 2008 |
| 7355477 |
Transmitter power control loop for high-speed wireless LANs |
Apr. 8, 2008 |
| 7355478 |
RF amplifier with pulse detection and bias control |
Apr. 8, 2008 |
| 7355480 |
Bias circuit |
Apr. 8, 2008 |
| 7352244 |
Electronics parts for high frequency power amplifier |
Apr. 1, 2008 |
| 7352240 |
Method and apparatus for protecting devices in an RF power amplifier |
Apr. 1, 2008 |
| 7348853 |
Power detector for mismatched load |
Mar. 25, 2008 |
| 7348852 |
Device and method for power amplifier noise reduction |
Mar. 25, 2008 |
| 7348849 |
Variable gain amplifier |
Mar. 25, 2008 |
| 7348854 |
Automatic biasing and protection circuit for field effect transistor (FET) devices |
Mar. 25, 2008 |
| 7345547 |
Bias circuit for BJT amplifier |
Mar. 18, 2008 |
| 7342456 |
DC-bias network for a distributed amplifier |
Mar. 11, 2008 |
| 7339435 |
Amplifier and device having amplifier, and mutual conductance control method |
Mar. 4, 2008 |
| 7340228 |
Apparatus and method for high efficiency RF power amplification using drain bias adaptation |
Mar. 4, 2008 |
| 7336132 |
High-frequency power amplifier circuit and electronic part for communication |
Feb. 26, 2008 |
| 7332966 |
High frequency power amplifier circuit |
Feb. 19, 2008 |
| 7323937 |
Variable-gain amplifier |
Jan. 29, 2008 |
| 7315211 |
Sliding bias controller for use with radio frequency power amplifiers |
Jan. 1, 2008 |
| 7312655 |
Apparatus and method for controlling bias adaptation bias of a high power amplifier |
Dec. 25, 2007 |
| 7307478 |
Adjustable power amplifier and applications thereof |
Dec. 11, 2007 |
| 7304539 |
High frequency power amplifier circuit and electronic component for high frequency power amplifier |
Dec. 4, 2007 |
| 7304540 |
Source follower and current feedback circuit thereof |
Dec. 4, 2007 |
| 7301400 |
Multi-phase switching power supply for mobile telephone applications |
Nov. 27, 2007 |
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