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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 |
| 6956430 |
Distortion detector |
Oct. 18, 2005 |
| 6956433 |
Polynomial predistorter using complex vector multiplication |
Oct. 18, 2005 |
| 6954537 |
Power-off noise suppression circuit and associated methods for an audio amplifier device |
Oct. 11, 2005 |
| 6952133 |
Low-distortion differential circuit |
Oct. 4, 2005 |
| 6949975 |
Distortion detection for a power amplifier |
Sep. 27, 2005 |
| 6949976 |
Distortion compensating amplifier device, amplifier system, and wireless base station |
Sep. 27, 2005 |
| 6946908 |
Programmable radio frequency predistortion linearizer and method thereof |
Sep. 20, 2005 |
| 6947712 |
Group delay precompensator for broadband radio frequency transmitter and method of operating the same |
Sep. 20, 2005 |
| 6943627 |
Calibration of an adaptive signal conditioning system |
Sep. 13, 2005 |
| 6943628 |
Methods and apparatus for substantially reducing nonlinear distortion |
Sep. 13, 2005 |
| 6940350 |
Amplifier and method for canceling nonlinearity in amplifier |
Sep. 6, 2005 |
| 6937675 |
Apparatus for improving intermodulation distortion characteristics in a CDMA mobile terminal |
Aug. 30, 2005 |
| 6933780 |
Predistortion circuit and power amplifier |
Aug. 23, 2005 |
| 6930547 |
Linearizing LINC amplifiers using pre-distortion |
Aug. 16, 2005 |
| 6928122 |
Amplifier predistortion system and method |
Aug. 9, 2005 |
| 6928272 |
Distortion compensating circuit for compensating distortion occurring in power amplifier |
Aug. 9, 2005 |
| 6924699 |
Apparatus, methods and articles of manufacture for digital modification in electromagnetic signal processing |
Aug. 2, 2005 |
| 6924711 |
Multimode modulator employing a phase lock loop for wireless communications |
Aug. 2, 2005 |
| 6922103 |
Method and apparatus for low intermodulation distortion amplification in selected bands |
Jul. 26, 2005 |
| 6922104 |
Power amplifier distortion compensation apparatus and method thereof |
Jul. 26, 2005 |
| 6922552 |
Linearization method and signal processing device |
Jul. 26, 2005 |
| 6919764 |
Amplifier control system with statistical enhancement of resolution of digital control signals |
Jul. 19, 2005 |
| 6919765 |
Amplifier linearization by pre-distorting a decomposed input signal |
Jul. 19, 2005 |
| 6920312 |
RF generating system with fast loop control |
Jul. 19, 2005 |
| 6917764 |
Predistortion circuit with combined odd-order and even-order correction |
Jul. 12, 2005 |
| 6909756 |
Transmitter and distortion compensation method to be used therefor |
Jun. 21, 2005 |
| 6906585 |
Methods and apparatus for substantially reducing third order intermodulation distortion and other nonlinear distortions |
Jun. 14, 2005 |
| 6903604 |
Method and apparatus for modeling and estimating the characteristics of a power amplifier |
Jun. 7, 2005 |
| 6897721 |
Composite amplifier with optimized linearity and efficiency |
May. 24, 2005 |
| 6897722 |
Adaptive linearizer for RF power amplifiers |
May. 24, 2005 |
| 6897723 |
Feed-forward amplifier loop control utilizing if signal processing |
May. 24, 2005 |
| 6897724 |
System and method for adjusting group delay |
May. 24, 2005 |
| 6894657 |
Bi-directional vector modulator |
May. 17, 2005 |
| 6891435 |
System and method for reducing second order distortion in electronic circuits |
May. 10, 2005 |
| 6885241 |
Type-based baseband predistorter function estimation technique for non-linear circuits |
Apr. 26, 2005 |
| 6885242 |
Feedforward linear amplifier |
Apr. 26, 2005 |
| 6885709 |
Method for linearising a power amplifier over a wide frequency band |
Apr. 26, 2005 |
| 6882217 |
Cubic spline predistortion, algorithm and training, for a wireless LAN system |
Apr. 19, 2005 |
| 6882221 |
Digital predistortion for power amplifier |
Apr. 19, 2005 |
| 6873860 |
Base transceiver station with distortion compensation |
Mar. 29, 2005 |
| 6867648 |
Linearization apparatus capable of adjusting peak-to-average power ratio |
Mar. 15, 2005 |
| 6864742 |
Application of the doherty amplifier as a predistortion circuit for linearizing microwave amplifiers |
Mar. 8, 2005 |
| 6864745 |
Distortion compensation device |
Mar. 8, 2005 |
| 6861904 |
Feed forward amplification apparatus for compensating non-linear distortion |
Mar. 1, 2005 |
| 6859099 |
Nonlinear distortion compensation power amplifier |
Feb. 22, 2005 |
| 6856196 |
Distortion compensator |
Feb. 15, 2005 |
| 6853246 |
Adaptive predistortion system and a method of adaptively predistorting a signal |
Feb. 8, 2005 |
| 6853247 |
Methods and apparatus for using Taylor series expansion concepts to substantially reduce nonlinear distortion |
Feb. 8, 2005 |
| 6853248 |
Methods and apparatus for substantially reducing nonlinear distortion using multiple nonlinear devices |
Feb. 8, 2005 |
| 6850114 |
Pre-distortion of non-linear devices by post-detection |
Feb. 1, 2005 |
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