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Class Information
Number: 330/149
Name: Amplifiers > Hum or noise or distortion bucking introduced into signal channel
Description: Subject matter wherein the signal has a hum or noise component inadvertently introduced therein, as where there is ineffective filtering of a rectified A.C. power supply or bias, and wherein such objectional component is removed or reduced by the same hum or noise component introduced into the signal path of the amplifier in such manner as to oppose the objectional signal component, thereby removing it from, or reducing it in, the output signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7298204 |
Method and apparatus for outputting audio signal |
Nov. 20, 2007 |
| 7295066 |
Adaptive predistortion for a transmit system |
Nov. 13, 2007 |
| 7289776 |
Nonlinear distortion compensation circuit with feedback and baseband reference signal that are phase and amplitude controllable |
Oct. 30, 2007 |
| 7288988 |
Adaptive predistortion linearized amplifier system employing selective sampling |
Oct. 30, 2007 |
| 7283792 |
Method and apparatus for providing limiting power adjustment in a wireless communication system |
Oct. 16, 2007 |
| 7279972 |
Predistortion control apparatus |
Oct. 9, 2007 |
| 7277678 |
Fast closed-loop power control for non-constant envelope modulation |
Oct. 2, 2007 |
| 7274257 |
Variable gain wideband amplifier |
Sep. 25, 2007 |
| 7268620 |
Pre-distortion of non-linear devices |
Sep. 11, 2007 |
| 7268619 |
Amplifier pre-distorter method and apparatus |
Sep. 11, 2007 |
| 7266159 |
Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks |
Sep. 4, 2007 |
| 7259630 |
Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter |
Aug. 21, 2007 |
| 7259621 |
Distortion compensating device and power amplifying device with distortion compensating function |
Aug. 21, 2007 |
| 7259619 |
Amplifier circuit with reduced power-on transients and method thereof |
Aug. 21, 2007 |
| 7256626 |
Low-voltage differential signal driver with pre-emphasis circuit |
Aug. 14, 2007 |
| 7254244 |
Pop and click reduction using DAC power up and power down processing |
Aug. 7, 2007 |
| 7251462 |
Modulation circuit device, modulation method and radio communication device |
Jul. 31, 2007 |
| 7251293 |
Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics |
Jul. 31, 2007 |
| 7250815 |
Amplifier distortion management apparatus, systems, and methods |
Jul. 31, 2007 |
| 7248113 |
Methods and systems for stabilizing an amplifier |
Jul. 24, 2007 |
| 7248112 |
Hybrid distortion compensation method and hybrid distortion compensation device |
Jul. 24, 2007 |
| 7242780 |
Audio signal cable with passive network |
Jul. 10, 2007 |
| 7242247 |
Distortion compensation circuit, power amplifier using distortion compensation circuit, and distortion compensation signal generating method |
Jul. 10, 2007 |
| 7239671 |
System and method for digital timing error correction in a communications system utilizing adaptive predistortion |
Jul. 3, 2007 |
| 7239203 |
LMS-based adaptive pre-distortion for enhanced power amplifier efficiency |
Jul. 3, 2007 |
| 7236052 |
Adaptive predistortion for a transmit system |
Jun. 26, 2007 |
| 7224222 |
High efficiency linear RF amplifier |
May. 29, 2007 |
| 7221223 |
Methods and apparatus of managing a power amplifier |
May. 22, 2007 |
| 7221222 |
Methods and apparatus of managing a power amplifier |
May. 22, 2007 |
| 7221221 |
Power amplifier with pre-distorter |
May. 22, 2007 |
| 7218904 |
Removing close-in interferers through a feedback loop |
May. 15, 2007 |
| 7218172 |
Apparatus and method for controlling adaptive circuits |
May. 15, 2007 |
| 7209715 |
Power amplifying method, power amplifier, and communication apparatus |
Apr. 24, 2007 |
| 7208992 |
Lossy linearizers for analog optical transmitters |
Apr. 24, 2007 |
| 7202737 |
Method of influencing an input signal and predistorter |
Apr. 10, 2007 |
| 7202731 |
Variable distortion limiter using clip detect predictor |
Apr. 10, 2007 |
| 7199736 |
Digital linearizing system |
Apr. 3, 2007 |
| 7194043 |
System and method for predistorting a signal to reduce out-of-band error |
Mar. 20, 2007 |
| 7193473 |
High power Doherty amplifier using multi-stage modules |
Mar. 20, 2007 |
| 7193462 |
RF power amplifier system employing an analog predistortion module using zero crossings |
Mar. 20, 2007 |
| 7193461 |
Method and apparatus for performing digital pre-distortion |
Mar. 20, 2007 |
| 7190223 |
Amplifier |
Mar. 13, 2007 |
| 7190222 |
Predistorter |
Mar. 13, 2007 |
| 7187234 |
Decorrelated power amplifier linearizers |
Mar. 6, 2007 |
| 7184490 |
Low power distributed transmitter |
Feb. 27, 2007 |
| 7183847 |
Multi-band look-up table type predistorter |
Feb. 27, 2007 |
| 7180368 |
Distortion compensation circuit, distortion compensation signal generating method, and power amplifier |
Feb. 20, 2007 |
| 7173484 |
System and method of carrier reinjection in a feedforward amplifier |
Feb. 6, 2007 |
| 7170346 |
Arrangement for reducing non-linear distortions in an output signal of an amplifier stage |
Jan. 30, 2007 |
| 7170345 |
Predistorter |
Jan. 30, 2007 |
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