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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 |
| 6519010 |
Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components |
Feb. 11, 2003 |
| 6515543 |
Circuit configuration for controlling nonlinear paths |
Feb. 4, 2003 |
| 6515544 |
Multi-terminal power combining feed-forward amplifier |
Feb. 4, 2003 |
| 6512417 |
Linear amplifier arrangement |
Jan. 28, 2003 |
| 6509789 |
Circuit for reducing second and third order intermodulation distortion for a broadband RF amplifier |
Jan. 21, 2003 |
| 6507244 |
Transmitter with a sliding compression point |
Jan. 14, 2003 |
| 6507731 |
Wireless communication apparatus with transmission power controller and method thereof |
Jan. 14, 2003 |
| 6504425 |
Method and apparatus for modeling and estimating the characteristics of a power amplifier by retaining even-order terms in estimating characteristics |
Jan. 7, 2003 |
| 6504428 |
High linearity multicarrier RF amplifier |
Jan. 7, 2003 |
| 6504430 |
Feedforward type linearizer |
Jan. 7, 2003 |
| 6501805 |
Broadcast transmission system with single correction filter for correcting linear and non-linear distortion |
Dec. 31, 2002 |
| 6498529 |
Method and apparatus for calculating the predistortion function from a power amplifier |
Dec. 24, 2002 |
| 6498532 |
System and method for linearizing vacuum electronic amplification |
Dec. 24, 2002 |
| 6496062 |
Predistortion system and method using a pilot signal |
Dec. 17, 2002 |
| 6496064 |
Intermodulation product cancellation circuit |
Dec. 17, 2002 |
| 6496065 |
Linear amplifier using frequency 2nd order intermodulation feed-forwarding method |
Dec. 17, 2002 |
| 6493543 |
Multichannel amplification system using mask detection |
Dec. 10, 2002 |
| 6489846 |
Distortion compensating device and distortion compensating method |
Dec. 3, 2002 |
| 6486734 |
Amplifier apparatus |
Nov. 26, 2002 |
| 6480702 |
Apparatus and method for distributing wireless communications signals to remote cellular antennas |
Nov. 12, 2002 |
| 6480704 |
Method and arrangement for forming a transmission signal |
Nov. 12, 2002 |
| 6480705 |
Distortion compensation method and wireless communication apparatus |
Nov. 12, 2002 |
| 6473595 |
RF active balun circuit for improving small-signal linearity |
Oct. 29, 2002 |
| 6466092 |
Distortion compensation method and apparatus |
Oct. 15, 2002 |
| 6462617 |
Method and apparatus for calculating the predistortion function from a power amplifier model |
Oct. 8, 2002 |
| 6459334 |
Amplifier measurement and modeling processes for use in generating predistortion parameters |
Oct. 1, 2002 |
| 6459337 |
System and method for noise and spurious suppression in power amplifier systems |
Oct. 1, 2002 |
| 6452446 |
Closed loop active cancellation technique (ACT)-based RF power amplifier linearization architecture |
Sep. 17, 2002 |
| 6452447 |
Adaptive distortion-compensation apparatus |
Sep. 17, 2002 |
| 6445249 |
Modification of phase component of error signal to reduce variation of phase component of output signal of power amplifier |
Sep. 3, 2002 |
| 6442443 |
Information processing apparatus and power saving apparatus |
Aug. 27, 2002 |
| 6437644 |
Predistorter |
Aug. 20, 2002 |
| 6433641 |
Power amplifier and communication device including power amplifier |
Aug. 13, 2002 |
| 6429736 |
On-line calibration of linear amplifiers |
Aug. 6, 2002 |
| 6429740 |
High power amplifier linearization method using extended saleh model predistortion |
Aug. 6, 2002 |
| 6429741 |
Circuit for detecting distortion in an amplifier, in particular an audio amplifier |
Aug. 6, 2002 |
| 6424213 |
Loss reduction using multiple amplifiers identically divided |
Jul. 23, 2002 |
| 6424214 |
Strain error compensation amplifier |
Jul. 23, 2002 |
| 6417731 |
Distortion-compensated amplifier device |
Jul. 9, 2002 |
| 6414545 |
Predistortion to improve linearity of an amplifier |
Jul. 2, 2002 |
| 6414546 |
Adaptive linearizer for RFpower amplifiers |
Jul. 2, 2002 |
| 6407634 |
Linear envelope tracking RF power amplifier with adaptive analog signal processing |
Jun. 18, 2002 |
| 6407635 |
Carrier-blanking mechanism for sweeping detector used to measure and correct RF power amplifier distortion |
Jun. 18, 2002 |
| 6404284 |
Amplifier bias adjustment circuit to maintain high-output third-order intermodulation distortion performance |
Jun. 11, 2002 |
| 6400222 |
Linearizer |
Jun. 4, 2002 |
| 6400223 |
Double carrier cancellation in wide band multi-carrier feed forward linearized power amplifier |
Jun. 4, 2002 |
| 6400415 |
System and method for predistorting signals to be amplified |
Jun. 4, 2002 |
| 6400775 |
Method and a system for digitally linearizing an amplifier |
Jun. 4, 2002 |
| 6396327 |
Method and apparatus for reducing distortion produced by a nonlinear device |
May. 28, 2002 |
| 6396344 |
Amplifier linearization by learned linear behavior |
May. 28, 2002 |
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