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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 |
| 7616055 |
Transmitter apparatus with extended gain control |
Nov. 10, 2009 |
| 7609111 |
Negative capacitance synthesis |
Oct. 27, 2009 |
| 7606539 |
Adaptive predistorter coupled to a nonlinear element |
Oct. 20, 2009 |
| 7606324 |
Digital pre-distortion technique using non-linear filters |
Oct. 20, 2009 |
| 7606322 |
Digital pre-distortion technique using nonlinear filters |
Oct. 20, 2009 |
| 7602244 |
Power amplifier bias synchronization |
Oct. 13, 2009 |
| 7598806 |
Distortion compensation circuit |
Oct. 6, 2009 |
| 7595689 |
Predistorter |
Sep. 29, 2009 |
| 7573329 |
System and method for IM3 reduction and cancellation in amplifiers |
Aug. 11, 2009 |
| 7564305 |
System and method for self-cancellation of N.sup.th-order intermodulation products |
Jul. 21, 2009 |
| 7564304 |
Audio power amplifier apparatus |
Jul. 21, 2009 |
| 7561857 |
Model network of a nonlinear circuitry |
Jul. 14, 2009 |
| 7561809 |
Modulated laser with integral pre-distortion circuit |
Jul. 14, 2009 |
| 7561629 |
Multicarrier receiver and transmitter with delay correcting function |
Jul. 14, 2009 |
| 7558541 |
Amplifier gain and phase stabilizer |
Jul. 7, 2009 |
| 7557654 |
Linearizer |
Jul. 7, 2009 |
| 7555059 |
Low power distributed transmitter |
Jun. 30, 2009 |
| 7554397 |
Highly linear low-noise amplifiers |
Jun. 30, 2009 |
| 7551905 |
Distortion compensation apparatus |
Jun. 23, 2009 |
| 7551687 |
Distortion compensating apparatus |
Jun. 23, 2009 |
| 7551686 |
Multiple polynomial digital predistortion |
Jun. 23, 2009 |
| 7548110 |
Power amplifier and method for reducing common noise of power amplifier |
Jun. 16, 2009 |
| 7545880 |
Multiple polynomial digital predistortion |
Jun. 9, 2009 |
| 7545211 |
Predistortion linearization device with adjustable amplitude and shape |
Jun. 9, 2009 |
| 7542519 |
Radio frequency transmitter and method therefor |
Jun. 2, 2009 |
| 7541868 |
Delay modulator pre-distortion circuit for an amplifier |
Jun. 2, 2009 |
| 7539466 |
Amplifier with varying supply voltage and input attenuation based upon supply voltage |
May. 26, 2009 |
| 7538632 |
Method and apparatus for controlling adaptive circuits |
May. 26, 2009 |
| 7535973 |
Correction method and correction loop for a complex digital signal |
May. 19, 2009 |
| 7535298 |
Arrangement and a method relating to signal predistortion |
May. 19, 2009 |
| 7528652 |
Amplifying device and radio communication circuit |
May. 5, 2009 |
| 7522672 |
Digital branch calibrator for an RF transmitter |
Apr. 21, 2009 |
| 7518445 |
Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters |
Apr. 14, 2009 |
| 7514996 |
Distortion compensation amplifying apparatus |
Apr. 7, 2009 |
| 7511574 |
Predistorter |
Mar. 31, 2009 |
| 7509109 |
Adaptive correction of a received signal frequency response tilt |
Mar. 24, 2009 |
| 7508266 |
Method for enhancing linearity of a transistor amplifier using switched capacitive loads |
Mar. 24, 2009 |
| 7492223 |
Method and system for a highly efficient power amplifier utilizing dynamic biasing and predistortion |
Feb. 17, 2009 |
| 7489191 |
Circuit and method for reducing bias noise in amplifier circuits |
Feb. 10, 2009 |
| 7479828 |
Selecting samples for amplifier digital predistortion estimation |
Jan. 20, 2009 |
| 7474150 |
Amplifier composite triple beat (CTB) reduction by phase filtering |
Jan. 6, 2009 |
| 7471739 |
Advanced adaptive pre-distortion in a radio frequency transmitter |
Dec. 30, 2008 |
| 7469130 |
Polar modulator and method for determining an amplitude offset in a polar modulator |
Dec. 23, 2008 |
| 7466197 |
Selecting samples for amplifier digital predistortion estimation |
Dec. 16, 2008 |
| 7466195 |
Error driven RF power amplifier control with increased efficiency |
Dec. 16, 2008 |
| 7456688 |
Signal extraction circuit and distortion-compensated amplifier incorporating the same |
Nov. 25, 2008 |
| 7449946 |
High voltage, high current, and high accuracy amplifier |
Nov. 11, 2008 |
| 7436900 |
Intermodulation distortion identification and quantization circuit for a linear amplifier system |
Oct. 14, 2008 |
| 7429892 |
Model based distortion reduction for power amplifiers |
Sep. 30, 2008 |
| 7427896 |
Device and method for predistorting and input signal |
Sep. 23, 2008 |
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