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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 |
| 6624695 |
Waveform pershaping for efficiency improvements in DC to RF conversion |
Sep. 23, 2003 |
| 6625470 |
Transmitter |
Sep. 23, 2003 |
| 6621340 |
System for reducing adjacent-channel interference by pre-linearization and pre-distortion |
Sep. 16, 2003 |
| 6621349 |
Power supply noise compensation amplifier |
Sep. 16, 2003 |
| 6617920 |
Linear envelope tracking RF power amplifier with adaptive analog signal processing |
Sep. 9, 2003 |
| 6600365 |
Audio transient suppression circuits and methods |
Jul. 29, 2003 |
| 6600368 |
Adaptive predistortion linearizer |
Jul. 29, 2003 |
| 6600369 |
Wideband linear amplifier with predistortion error correction |
Jul. 29, 2003 |
| 6600370 |
Intermodulation signal detector |
Jul. 29, 2003 |
| 6600371 |
Low noise amplifier |
Jul. 29, 2003 |
| 6600388 |
Electronic variable delay line filters using two in-line varactor-controlled four-input couplers allowing variable delay |
Jul. 29, 2003 |
| 6600792 |
Predistortion technique for high power amplifiers |
Jul. 29, 2003 |
| 6593806 |
Circuits and methods for compensating switched mode amplifiers |
Jul. 15, 2003 |
| 6593811 |
Nonlinear feedback linearizer |
Jul. 15, 2003 |
| 6590449 |
Predistortion circuit, low-distortion power amplifier, and control methods therefor |
Jul. 8, 2003 |
| 6590450 |
System and method for linearizing vacuum electronic amplification |
Jul. 8, 2003 |
| 6590451 |
RF amplifier with feedback based linearization |
Jul. 8, 2003 |
| 6590683 |
Bandwidth efficient phase shift keyed modulation over nonlinear distortion limited optical fiber links |
Jul. 8, 2003 |
| 6590940 |
Power modulation systems and methods that separately amplify low and high frequency portions of an amplitude waveform |
Jul. 8, 2003 |
| 6586993 |
Impedance matching low noise amplifier having a bypass switch |
Jul. 1, 2003 |
| 6587513 |
Predistorter |
Jul. 1, 2003 |
| 6587514 |
Digital predistortion methods for wideband amplifiers |
Jul. 1, 2003 |
| 6583664 |
Apparatus and method for efficiently amplifying wideband envelope signals |
Jun. 24, 2003 |
| 6583739 |
Feed forward distortion reduction system |
Jun. 24, 2003 |
| 6580319 |
Amplitude and phase transfer linearization method and apparatus for a wideband amplifier |
Jun. 17, 2003 |
| 6580320 |
Signal processing apparatus |
Jun. 17, 2003 |
| 6577177 |
Non-linear distortion generator |
Jun. 10, 2003 |
| 6577189 |
Scheme for reducing transmit-band noise floor and adjacent channel power with power backoff |
Jun. 10, 2003 |
| 6577192 |
Predistortion-type distortion compensation amplifying apparatus |
Jun. 10, 2003 |
| 6577193 |
Linear power amplifying apparatus |
Jun. 10, 2003 |
| 6573792 |
Feedforward amplifier |
Jun. 3, 2003 |
| 6573793 |
Reflect forward adaptive linearizer amplifier |
Jun. 3, 2003 |
| 6570430 |
Non-linear distortion generator for both second and third order distortion |
May. 27, 2003 |
| 6570444 |
Low noise wideband digital predistortion amplifier |
May. 27, 2003 |
| 6570445 |
Linearizer for microwave amplifier |
May. 27, 2003 |
| 6566945 |
Feedforward amplifier |
May. 20, 2003 |
| 6566948 |
Method and system for reducing non-linearities |
May. 20, 2003 |
| 6556079 |
Distortion compensating device and method for compensating distortion |
Apr. 29, 2003 |
| 6552609 |
Signal distortion compensating apparatus and method |
Apr. 22, 2003 |
| 6549067 |
Method and apparatus for linearizing an output signal |
Apr. 15, 2003 |
| 6545487 |
System and method for producing an amplified signal with reduced distortion |
Apr. 8, 2003 |
| 6545535 |
Method and apparatus for reducing distortion |
Apr. 8, 2003 |
| 6545536 |
Biasing circuit for VGS drift and thermal compensation of a power device |
Apr. 8, 2003 |
| 6538509 |
Linearizer for a power amplifier |
Mar. 25, 2003 |
| 6531917 |
Non-linear distortion compensating apparatus |
Mar. 11, 2003 |
| 6531918 |
Low cost, pilotless, feed forward compensation for a power amplifier |
Mar. 11, 2003 |
| 6529072 |
Predistortion-based amplifier, transmitter and envelope detector |
Mar. 4, 2003 |
| 6522197 |
Method and apparatus for optimum biasing of cascaded MOSFET radio-frequency devices |
Feb. 18, 2003 |
| 6522198 |
Power amplifier having predistortion linearizer |
Feb. 18, 2003 |
| 6518840 |
Circuit for linearizing the power control profile of a BiCMOS power amplifier |
Feb. 11, 2003 |
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