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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 |
| 6850115 |
Enhanced efficiency LDMOS based feed forward amplifier |
Feb. 1, 2005 |
| 6847259 |
Amplifier |
Jan. 25, 2005 |
| 6836646 |
Circuit and method for compensating for non-linear distortion |
Dec. 28, 2004 |
| 6833758 |
Power amplifier |
Dec. 21, 2004 |
| 6831512 |
Self-calibrated power amplifier linearizers |
Dec. 14, 2004 |
| 6819173 |
Method and apparatus for reduction of distortion in a transmitter |
Nov. 16, 2004 |
| 6819174 |
Amplification device |
Nov. 16, 2004 |
| 6819175 |
Feed forward amplifying circuit |
Nov. 16, 2004 |
| 6819720 |
Noise cancellation in a predistortion architecture |
Nov. 16, 2004 |
| 6812791 |
Method and system for linearizing an amplified signal |
Nov. 2, 2004 |
| 6812792 |
Precorrection of a nonlinear amplifier |
Nov. 2, 2004 |
| 6812793 |
Power supply rejection circuit for an audio amplifier |
Nov. 2, 2004 |
| 6809587 |
Active predistorting linearizer with agile bypass circuit for safe mode operation |
Oct. 26, 2004 |
| 6809588 |
Distortion compensation circuit |
Oct. 26, 2004 |
| 6809607 |
Circuit and method for compensating for non-linear distortion |
Oct. 26, 2004 |
| 6798843 |
Wideband digital predistortion linearizer for nonlinear amplifiers |
Sep. 28, 2004 |
| 6799021 |
Method and arrangement for forming an address |
Sep. 28, 2004 |
| 6794920 |
Sampled analog DC offset correction for data bus structures |
Sep. 21, 2004 |
| 6794936 |
Equalizer system and method for predistortion |
Sep. 21, 2004 |
| 6794937 |
Predistortion linearizer and method for linearizing a nonlinear device |
Sep. 21, 2004 |
| 6794938 |
Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities |
Sep. 21, 2004 |
| 6794939 |
Signal predistortion using a combination of multiple predistortion techniques |
Sep. 21, 2004 |
| 6791408 |
System and method for noise and spurious suppression in power amplifier systems |
Sep. 14, 2004 |
| 6791409 |
Feedforward amplifier and feedforward amplification method |
Sep. 14, 2004 |
| 6791410 |
Feedforward amplifier and method of improving the performance thereof |
Sep. 14, 2004 |
| 6792251 |
Arrangement and method for improving multi-carrier power amplifier efficiency |
Sep. 14, 2004 |
| 6788139 |
Broadband predistortion linearizer |
Sep. 7, 2004 |
| 6788140 |
Ultra-low distortion, wide-bandwidth amplifier architecture using actively phase-matched feed-forward linearization |
Sep. 7, 2004 |
| 6784731 |
System and method for reducing amplifier distortion using distortion feedback |
Aug. 31, 2004 |
| 6781454 |
Linearized traveling wave tube circuit with pre-distortion linearizer |
Aug. 24, 2004 |
| 6781467 |
High linearity low noise amplifier |
Aug. 24, 2004 |
| 6771125 |
Tuning feed-forward amplifiers and the like |
Aug. 3, 2004 |
| 6768434 |
High speed x/sine(x) correction circuit |
Jul. 27, 2004 |
| 6765440 |
Model-based feed-forward linearization of amplifiers |
Jul. 20, 2004 |
| 6766151 |
Distortion-compensating apparatus |
Jul. 20, 2004 |
| 6760230 |
Compact, high efficiency, high isolation power amplifier |
Jul. 6, 2004 |
| 6756844 |
Distortion compensation amplification apparatus of feed forward type and adaptive pre-distortion type |
Jun. 29, 2004 |
| 6756845 |
Method and system for compensating non-linearities and time-varying changes of a transfer function acting on an input signal |
Jun. 29, 2004 |
| 6757525 |
Distortion compensating apparatus |
Jun. 29, 2004 |
| 6753728 |
Distortion reducing circuit |
Jun. 22, 2004 |
| 6750709 |
Bipolar transistor-based linearizer with programmable gain and phase response system |
Jun. 15, 2004 |
| 6750710 |
Distortion reduction |
Jun. 15, 2004 |
| 6751447 |
Adaptive digital pre-distortion circuit using output reference signal and method of operation |
Jun. 15, 2004 |
| 6744314 |
Wideband power amplifier linearization technique |
Jun. 1, 2004 |
| 6744315 |
Transmission amplifier |
Jun. 1, 2004 |
| 6744316 |
Method and apparatus far reduction of distortion in a transmitter |
Jun. 1, 2004 |
| 6744317 |
Digital linearizer of high power amplifier and digital linearizing method |
Jun. 1, 2004 |
| 6741128 |
Distortion canceling circuit |
May. 25, 2004 |
| 6741840 |
RF transmitters with saturation detection and correction and methods therefor |
May. 25, 2004 |
| 6737914 |
Removing effects of gain and phase mismatch in a linear amplification with nonlinear components (LINC) system |
May. 18, 2004 |
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