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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 |
| 6285252 |
Apparatus and method for broadband feedforward predistortion |
Sep. 4, 2001 |
| 6285253 |
Systems, methods, and circuits for reducing HUM modulation in amplifiers |
Sep. 4, 2001 |
| 6285254 |
System and method for linearizing vacuum electronic amplification |
Sep. 4, 2001 |
| 6285255 |
Adaptive compensation for carrier signal phase distortion |
Sep. 4, 2001 |
| 6281936 |
Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components |
Aug. 28, 2001 |
| 6275103 |
Predistorter of amplifier and amplifying unit |
Aug. 14, 2001 |
| 6275104 |
Multistage amplifier with local error correction |
Aug. 14, 2001 |
| 6275105 |
Adaptive linearization of a feedforward amplifier by complex gain stabilization of the error amplifier |
Aug. 14, 2001 |
| 6275106 |
Spectral distortion monitor for controlling pre-distortion and feed-forward linearization of rf power amplifier |
Aug. 14, 2001 |
| 6275685 |
Linear amplifier arrangement |
Aug. 14, 2001 |
| 6271721 |
Common-base transistor amplifiers with linearity augmentation |
Aug. 7, 2001 |
| 6271723 |
Distortion compensating device |
Aug. 7, 2001 |
| 6271724 |
Linearization method and amplifier arrangement |
Aug. 7, 2001 |
| 6272326 |
Distortion compensation address generator, distortion compensating circuit, and transmitter |
Aug. 7, 2001 |
| 6268768 |
Amplifier having linear characteristics |
Jul. 31, 2001 |
| 6262631 |
Silicon power bipolar junction transistor with an integrated linearizer |
Jul. 17, 2001 |
| 6259319 |
Adaptive gain and/or phase adjustment control system and method |
Jul. 10, 2001 |
| 6259320 |
Error correction within power amplifiers |
Jul. 10, 2001 |
| 6259899 |
System and method for analysis of intermodulation dispersion |
Jul. 10, 2001 |
| 6255904 |
Anti-pop circuit for AC amplifiers |
Jul. 3, 2001 |
| 6255906 |
Power amplifier operated as an envelope digital to analog converter with digital pre-distortion |
Jul. 3, 2001 |
| 6255908 |
Temperature compensated and digitally controlled amplitude and phase channel amplifier linearizer for multi-carrier amplification systems |
Jul. 3, 2001 |
| 6246286 |
Adaptive linearization of power amplifiers |
Jun. 12, 2001 |
| 6242975 |
Envelope peak and trough limiting to improve amplifier efficiency and distortion characteristics |
Jun. 5, 2001 |
| 6242978 |
Method and apparatus for linearizing an amplifier |
Jun. 5, 2001 |
| 6242979 |
Linearization using parallel cancellation in linear power amplifier |
Jun. 5, 2001 |
| 6239657 |
Method and device for measuring the distortion of a high-frequency power amplifier and method and means for automatically equalizing a high-frequency power amplifier |
May. 29, 2001 |
| 6240144 |
Apparatus and method of linearizing a power amplifier in a mobile radio communication system |
May. 29, 2001 |
| 6240278 |
Scalar cost function based predistortion linearizing device, method, phone and basestation |
May. 29, 2001 |
| 6236267 |
Linearization for power amplifiers using feed-forward and feedback control |
May. 22, 2001 |
| 6236286 |
Integrated on-board automated alignment for a low distortion amplifier |
May. 22, 2001 |
| 6236837 |
Polynomial Predistortion linearizing device, method, phone and base station |
May. 22, 2001 |
| 6232835 |
System and method of linearizing the gain error of a power amplifier |
May. 15, 2001 |
| 6232836 |
In-line, unbalanced amplifier, predistortion circuit |
May. 15, 2001 |
| 6232837 |
Optimal control method for adaptive feedforward linear amplifier |
May. 15, 2001 |
| 6232838 |
Feed-forward amplifier and method of compensating non-linear distortion in the same |
May. 15, 2001 |
| 6211733 |
Predistortion compensation for a power amplifier |
Apr. 3, 2001 |
| 6211734 |
Active distortion signal generating circuit for a line-distortion type power amplifier |
Apr. 3, 2001 |
| 6208204 |
Feedforward amplifier |
Mar. 27, 2001 |
| 6208207 |
Adaptive linearizer for RF power amplifiers |
Mar. 27, 2001 |
| 6198346 |
Adaptive linear amplifier without output power loss |
Mar. 6, 2001 |
| 6194942 |
Predistortion circuit for linearization of signals |
Feb. 27, 2001 |
| 6194963 |
Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation |
Feb. 27, 2001 |
| 6194964 |
Predistorter having an automatic gain control circuit and method therefor |
Feb. 27, 2001 |
| 6191653 |
Circuit and method for linearizing amplitude modulation in a power amplifier |
Feb. 20, 2001 |
| 6188279 |
Low cost miniature broadband linearizer |
Feb. 13, 2001 |
| 6188732 |
Digital feedforward amplifier for use in an RF transmitter and method of operation |
Feb. 13, 2001 |
| 6181199 |
Power IQ modulation systems and methods |
Jan. 30, 2001 |
| 6178208 |
System for recovery of digital data from amplitude and phase modulated line signals using delay lines |
Jan. 23, 2001 |
| 6175270 |
Method and apparatus for tailored distortion of a signal prior to amplification to reduce clipping |
Jan. 16, 2001 |
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