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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 |
| 6172562 |
Device for controlling the amplitude and the phase of a radio frequency signal |
Jan. 9, 2001 |
| 6172563 |
Lossless feedback transistor amplifiers with linearity augmentation |
Jan. 9, 2001 |
| 6172564 |
Intermodulation product cancellation circuit |
Jan. 9, 2001 |
| 6172565 |
Adaptive joint linearization, equalization and delay alignment for a wideband power amplifier |
Jan. 9, 2001 |
| 6166599 |
Impedance matching networks for non-linear circuits |
Dec. 26, 2000 |
| 6166600 |
Automatic gain and phase controlled feedforward amplifier without pilot signal |
Dec. 26, 2000 |
| 6166601 |
Super-linear multi-carrier power amplifier |
Dec. 26, 2000 |
| 6163213 |
Amplifier and a method of power amplification |
Dec. 19, 2000 |
| 6160449 |
Power amplifying circuit with load adjust for control of adjacent and alternate channel power |
Dec. 12, 2000 |
| RE36987 |
Compensating for non-linear effects in signal processing with active devices |
Dec. 12, 2000 |
| 6154093 |
Fast adaptive wideband power amplifier feed forward linearizer using a RLS parameter tracking algorithm |
Nov. 28, 2000 |
| 6154641 |
Wideband multiple channel frequency converter |
Nov. 28, 2000 |
| 6147555 |
Amplification system having mask detection |
Nov. 14, 2000 |
| 6144255 |
Feedforward amplification system having mask detection compensation |
Nov. 7, 2000 |
| 6140858 |
Predistortion circuit for an analog signal in a video communication network |
Oct. 31, 2000 |
| 6140874 |
Amplification system having mask detection and bias compensation |
Oct. 31, 2000 |
| 6141390 |
Predistortion in a linear transmitter using orthogonal kernels |
Oct. 31, 2000 |
| 6137358 |
Class S radio frequency power amplifier |
Oct. 24, 2000 |
| 6133789 |
Method and system for robustly linearizing a radio frequency power amplifier using vector feedback |
Oct. 17, 2000 |
| 6133790 |
In-line, unbalanced amplifier, predistortion circuit |
Oct. 17, 2000 |
| 6133791 |
Feedforward amplifier with improved characteristics without using pilot signal |
Oct. 17, 2000 |
| 6127889 |
Nested feed forward distortion reduction system |
Oct. 3, 2000 |
| 6124757 |
Amplifiers |
Sep. 26, 2000 |
| 6118335 |
Method and apparatus for providing adaptive predistortion in power amplifier and base station utilizing same |
Sep. 12, 2000 |
| 6118339 |
Amplification system using baseband mixer |
Sep. 12, 2000 |
| 6111461 |
High frequency amplifier circuit |
Aug. 29, 2000 |
| 6111462 |
RF power amplifier linearization using parallel RF power amplifiers having intermod-complementing predistortion paths |
Aug. 29, 2000 |
| 6112062 |
Predistortion for high power amplifiers |
Aug. 29, 2000 |
| 6107872 |
Adaptive control of RF power amplifier power supply voltage |
Aug. 22, 2000 |
| 6107877 |
Predistortion generator coupled with an RF amplifier |
Aug. 22, 2000 |
| 6108385 |
Method and apparatus for reducing intermodulation distortion in digital wideband transmission systems |
Aug. 22, 2000 |
| 6104239 |
Method for correcting frequency-varying nonlinear errors and digital correction circuit implementing same |
Aug. 15, 2000 |
| 6104241 |
High efficiency feed-forward RF power amplifier with predistoration enchancement |
Aug. 15, 2000 |
| 6104242 |
Highly linear transconductor with passive feedback |
Aug. 15, 2000 |
| 6104919 |
Intermodulation distortion reduction circuit utilizing variable attenuation |
Aug. 15, 2000 |
| 6100757 |
Variable time delay network method and apparatus therof |
Aug. 8, 2000 |
| 6101373 |
Amplifier system |
Aug. 8, 2000 |
| 6091295 |
Predistortion to improve linearity of an amplifier |
Jul. 18, 2000 |
| 6091296 |
Single loop feedforward amplifier for use in an RF transmitter and method of operation |
Jul. 18, 2000 |
| 6091297 |
Methods and apparatus for adaptive adjustments of feed-forward linearized amplifiers |
Jul. 18, 2000 |
| 6091298 |
Linear amplifier arrangement |
Jul. 18, 2000 |
| 6091299 |
Method and apparatus for achieving linearized response of PIN diode attenuators |
Jul. 18, 2000 |
| 6091941 |
Radio apparatus |
Jul. 18, 2000 |
| 6087898 |
Closed loop feed forward system featuring carrier reutilization for synchronous detection |
Jul. 11, 2000 |
| 6081156 |
Method and apparatus for amplifying feedforward linear power using pilot tone hopping |
Jun. 27, 2000 |
| 6081158 |
Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system |
Jun. 27, 2000 |
| 6081159 |
Apparatus for improving linearity of small signal |
Jun. 27, 2000 |
| 6081698 |
Radio apparatus and offset compensating method |
Jun. 27, 2000 |
| 6078216 |
Aliased wide band performance monitor for adjusting predistortion and vector modulator control parameters of RF amplifier |
Jun. 20, 2000 |
| 6075411 |
Method and apparatus for wideband predistortion linearization |
Jun. 13, 2000 |
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