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Class Information
Number: 330/129
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias
Description: Subject matter wherein the "means to control the bias voltage" is applied to an input electrode of the amplifying device, or to an electrode separate and distinct from the signal input electrodes and in vacuum tube amplifiers also separate and distinct from the anode or screen grid electrodes in order to control the bias of such electrode.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456690 |
Automatic gain control using multi-comparators |
Nov. 25, 2008 |
| 7457598 |
Signal amplifier system for a broadcast receiver |
Nov. 25, 2008 |
| 7454179 |
Radio frequency power detector and decision circuit used with DC supply voltage controlled power amplifiers |
Nov. 18, 2008 |
| 7450916 |
Excess current and saturation detection and correction in a power amplifier |
Nov. 11, 2008 |
| 7446605 |
Amplifier arrangement with controllable gain and method for controlling an amplifier gain |
Nov. 4, 2008 |
| 7443236 |
CDMA power amplifier design for low and high power modes |
Oct. 28, 2008 |
| 7436334 |
Amplifier, analogue to digital converter, methods of amplifying and of converting an analogue input signal to a digital output signal and of producing a mineral hydrocarbon fluid |
Oct. 14, 2008 |
| 7427894 |
Dual-mode, dual-load high efficiency RF power amplifier |
Sep. 23, 2008 |
| 7411456 |
AGC circuit |
Aug. 12, 2008 |
| 7382186 |
Amplifiers with high efficiency in multiple power modes |
Jun. 3, 2008 |
| 7382296 |
System for mixed analog-digital automatic gain control |
Jun. 3, 2008 |
| 7362172 |
Variable gain circuit |
Apr. 22, 2008 |
| 7352244 |
Electronics parts for high frequency power amplifier |
Apr. 1, 2008 |
| 7345536 |
Amplifier circuit and control method thereof |
Mar. 18, 2008 |
| 7342445 |
Radio frequency power amplifier circuit and method |
Mar. 11, 2008 |
| 7340228 |
Apparatus and method for high efficiency RF power amplification using drain bias adaptation |
Mar. 4, 2008 |
| 7333781 |
Power correction loop for a power amplifier |
Feb. 19, 2008 |
| 7323922 |
Digitally controlled gain stage having an analogue control input |
Jan. 29, 2008 |
| 7319363 |
Method and circuit for controlling amplification |
Jan. 15, 2008 |
| 7317352 |
Power amplifier |
Jan. 8, 2008 |
| 7298212 |
Automatic level control circuit with improved attack action |
Nov. 20, 2007 |
| 7295073 |
Automatic gain control apparatus |
Nov. 13, 2007 |
| 7292103 |
Amplifier system having compensated amplification variation |
Nov. 6, 2007 |
| 7288986 |
Communication semiconductor integrated circuit device and wireless communication system |
Oct. 30, 2007 |
| 7286613 |
Process and device for modulating a carrier with amplitude and phase error compensation |
Oct. 23, 2007 |
| 7283792 |
Method and apparatus for providing limiting power adjustment in a wireless communication system |
Oct. 16, 2007 |
| 7274255 |
Efficient generation of radio frequency currents |
Sep. 25, 2007 |
| 7257383 |
Method and system for improving dynamic range for communication systems using upstream analog information |
Aug. 14, 2007 |
| 7254370 |
Method to maintain stability in a bi-directional amplifier |
Aug. 7, 2007 |
| 7253681 |
Power amplifier with integrated sensors |
Aug. 7, 2007 |
| 7250817 |
Linear power efficient radio frequency (RF) driver system and method with power level control |
Jul. 31, 2007 |
| 7248845 |
Variable-loss transmitter and method of operation |
Jul. 24, 2007 |
| 7224215 |
Intelligent RF power control for wireless modem devices |
May. 29, 2007 |
| 7224228 |
Semiconductor integrated circuit for high frequency power amplifier, electronic component for high frequency power amplifier, and radio communication system |
May. 29, 2007 |
| 7221225 |
Dual band power amplifier module for wireless communication devices |
May. 22, 2007 |
| 7215202 |
Programmable gain amplifier and method |
May. 8, 2007 |
| 7212592 |
Digitally programmable gain control circuit |
May. 1, 2007 |
| 7202736 |
CDMA power amplifier design for low and high power modes |
Apr. 10, 2007 |
| 7190221 |
Method and apparatus for maintaining constant linearity for a power amplifier over varying load conditions |
Mar. 13, 2007 |
| 7190219 |
Extended range variable-gain amplifier |
Mar. 13, 2007 |
| 7183844 |
Multi-state load switched power amplifier for polar modulation transmitter |
Feb. 27, 2007 |
| 7183845 |
Gain control methods and systems in an amplifier assembly |
Feb. 27, 2007 |
| 7180372 |
High frequency amplifier |
Feb. 20, 2007 |
| 7176761 |
Apparatus and method for receiving inputted signal |
Feb. 13, 2007 |
| 7173492 |
High frequency power amplification electric part and wireless communication system |
Feb. 6, 2007 |
| 7171171 |
GaAs RF signal detection circuit with operational amplifier |
Jan. 30, 2007 |
| 7167044 |
Dual-band CMOS front-end with two gain modes |
Jan. 23, 2007 |
| 7167718 |
Transmission power control apparatus, transmission power control method, and mobile station |
Jan. 23, 2007 |
| 7164314 |
Power amplifier module for wireless communication devices |
Jan. 16, 2007 |
| 7164315 |
Power detector for mismatched load |
Jan. 16, 2007 |
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