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Class Information
Number: 330/134
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Plural different bias control voltages provided by separate means
Description: Subject matter including at least two separate and distinct bias voltage control means as therein defined, wherein the control voltages are applied to input or gain control electrodes, and which may be applied to a single amplifying device or to more than one amplifying device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6621343 |
Open loop variable gain amplifier using replica gain cell |
Sep. 16, 2003 |
| 6614300 |
Dual current mirror power amplifier bias control |
Sep. 2, 2003 |
| 6577190 |
Linear gain control amplifier |
Jun. 10, 2003 |
| 6559717 |
Method and/or architecture for implementing a variable gain amplifier control |
May. 6, 2003 |
| 6538507 |
Automatic gain control circuit with high linearity and monotonically correlated offset voltage |
Mar. 25, 2003 |
| 6535068 |
System and method for temperature compensated IF amplifier |
Mar. 18, 2003 |
| 6492872 |
High frequency power amplifying module and wireless communication apparatus |
Dec. 10, 2002 |
| 6492869 |
Linear amplifier and radio communication apparatus using the same |
Dec. 10, 2002 |
| 6480068 |
Hardware assisted automatic gain control for digital subscriber line modems |
Nov. 12, 2002 |
| 6441686 |
Offset correction method and apparatus |
Aug. 27, 2002 |
| 6404283 |
Method and apparatus for amplifying a radio frequency signal |
Jun. 11, 2002 |
| 6380804 |
Method and apparatus for switching stages of a multistage amplifier quickly between operational modes |
Apr. 30, 2002 |
| 6359518 |
Signal level adjusting circuit using coupling stage for preventing variation from resulting in each operating point of first amplifying stage and second amplifying stage |
Mar. 19, 2002 |
| 6339361 |
Power amplifier driver system for wireless handset |
Jan. 15, 2002 |
| 6333675 |
Variable gain amplifier with gain control voltage branch circuit |
Dec. 25, 2001 |
| 6329879 |
High frequency power amplifier system and wireless communication system |
Dec. 11, 2001 |
| 6326842 |
Variable gain amplifying apparatus which can change a gain during an operation |
Dec. 4, 2001 |
| 6323729 |
Amplifier arrangement with voltage gain and reduced power consumption |
Nov. 27, 2001 |
| 6297694 |
High frequency power amplifier |
Oct. 2, 2001 |
| 6259318 |
Method for extending the liner range of an amplifier |
Jul. 10, 2001 |
| 6259901 |
Radio-frequency power amplifier of mobile communication equipment |
Jul. 10, 2001 |
| 6236266 |
Bias circuit and bias supply method for a multistage power amplifier |
May. 22, 2001 |
| 6229397 |
Automatic gain control circuit receiving apparatus incorporating said circuit automatic gain control method adaptable to receiving apparatus and recording medium |
May. 8, 2001 |
| 6208209 |
Automatic gain control circuit using a capacitor for minimizing digital coupling |
Mar. 27, 2001 |
| 6172567 |
Radio communication apparatus and radio frequency power amplifier |
Jan. 9, 2001 |
| 6127890 |
Variable gain circuit with improved gain response |
Oct. 3, 2000 |
| 6121838 |
Precision GaAs low-voltage DC amplifier |
Sep. 19, 2000 |
| 6122491 |
Communications system using power amplifier with dynamic biasing |
Sep. 19, 2000 |
| 6025753 |
Method and apparatus for amplifying a signal |
Feb. 15, 2000 |
| 6018270 |
Low voltage RF amplifier and mixed with single bias block and method |
Jan. 25, 2000 |
| 5901347 |
Fast automatic gain control circuit and method for zero intermediate frequency receivers and radiotelephone using same |
May. 4, 1999 |
| 5898347 |
Large signal attenuator |
Apr. 27, 1999 |
| 5898337 |
Output signal level control circuit using different detecting sections in different output signal levels |
Apr. 27, 1999 |
| 5886575 |
Apparatus and method for amplifying a signal |
Mar. 23, 1999 |
| 5867063 |
Gain distribution circuit |
Feb. 2, 1999 |
| 5841320 |
Variable gain amplifying device |
Nov. 24, 1998 |
| 5825239 |
Peak detector for automatic gain control |
Oct. 20, 1998 |
| 5815804 |
Dual-band filter network |
Sep. 29, 1998 |
| 5757229 |
Bias circuit for a power amplifier |
May. 26, 1998 |
| 5621359 |
Gain selection technique |
Apr. 15, 1997 |
| 5606285 |
Power control circuit for use with transmitter |
Feb. 25, 1997 |
| 5589796 |
Method and apparatus for increasing amplifier efficiency |
Dec. 31, 1996 |
| 5451901 |
Transconductance amplifiers and exponential variable gain amplifiers using the same |
Sep. 19, 1995 |
| 5442321 |
Automatic transimpedance control amplifier |
Aug. 15, 1995 |
| 5438298 |
Amplifier having overshoot preventing circuit |
Aug. 1, 1995 |
| 5432473 |
Dual mode amplifier with bias control |
Jul. 11, 1995 |
| 5422601 |
Hybrid analog digital automatic gain control gain recovery system |
Jun. 6, 1995 |
| 5376895 |
Control circuit and method for transmission output |
Dec. 27, 1994 |
| 5309115 |
Burst control circuit for use in TDMA communications system |
May. 3, 1994 |
| 5283533 |
Amplifier signal level detector for a mobile communication system |
Feb. 1, 1994 |
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