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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 |
| 6737918 |
Distortion compensation apparatus |
May. 18, 2004 |
| 6734726 |
Balanced distortion reduction circuit |
May. 11, 2004 |
| 6734731 |
Self-calibrated power amplifier linearizers |
May. 11, 2004 |
| 6734732 |
Adaptive linearizer for RF power amplifiers |
May. 11, 2004 |
| 6734733 |
Auxiliary amplifier in feedforward linearization amplification system |
May. 11, 2004 |
| 6734734 |
Amplifier phase droop and phase noise systems and methods |
May. 11, 2004 |
| 6731165 |
Electronic amplifier |
May. 4, 2004 |
| 6731168 |
Power amplifier linearizer that compensates for long-time-constant memory effects and method therefor |
May. 4, 2004 |
| 6731694 |
Isolator eliminator for a linear transmitter |
May. 4, 2004 |
| 6727751 |
Distortion compensation amplifier |
Apr. 27, 2004 |
| 6724253 |
Predistortion type linearizer controlled by two control voltages |
Apr. 20, 2004 |
| 6724840 |
Adaptive interference cancellation method |
Apr. 20, 2004 |
| 6720829 |
Distortion-compensated amplifying circuit |
Apr. 13, 2004 |
| 6717463 |
Circuit for linearizing electronic devices |
Apr. 6, 2004 |
| 6717464 |
Distortion compensating apparatus |
Apr. 6, 2004 |
| 6717465 |
Active harmonic suppression equipment and control method therefor |
Apr. 6, 2004 |
| 6714072 |
Distortion reduction |
Mar. 30, 2004 |
| 6714073 |
Predistortion type distortion compensation amplification apparatus |
Mar. 30, 2004 |
| 6710652 |
Feedforward amplifier |
Mar. 23, 2004 |
| 6711217 |
Apparatus and method for linearized power amplification |
Mar. 23, 2004 |
| 6707338 |
Control scheme for distortion reduction |
Mar. 16, 2004 |
| 6703897 |
Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers |
Mar. 9, 2004 |
| 6700442 |
N way phase cancellation power amplifier |
Mar. 2, 2004 |
| 6700443 |
Reduction of sensitivity of an amplifier to an offset voltage |
Mar. 2, 2004 |
| 6693974 |
Adaptive digital pre-distortion circuit using adjacent channel power profile and method of operation |
Feb. 17, 2004 |
| 6690235 |
Distortion generation in balanced and unbalanced signals |
Feb. 10, 2004 |
| 6687466 |
Dynamic distortion control |
Feb. 3, 2004 |
| 6683495 |
Reduced architecture for multibranch feedforward power amplifier linearizers |
Jan. 27, 2004 |
| 6680648 |
High power amplifier predistorter system |
Jan. 20, 2004 |
| 6680649 |
Coordinate rotation of pre-distortion vector in feedforward linearization amplification system |
Jan. 20, 2004 |
| 6677817 |
Feed forward amplifier with amplifier stage failure detection using pilot tones |
Jan. 13, 2004 |
| 6677820 |
Distortion compensation apparatus |
Jan. 13, 2004 |
| 6677821 |
Distortion compensating apparatus |
Jan. 13, 2004 |
| 6674324 |
System and method for producing an amplified signal using plurality of amplitudes across spectrum |
Jan. 6, 2004 |
| 6674326 |
Digitally controllable nonlinear pre-equalizer |
Jan. 6, 2004 |
| 6664852 |
Apparatus and method for digital control systems |
Dec. 16, 2003 |
| 6661284 |
Method and apparatus for error compensation in a hybrid matrix amplification system |
Dec. 9, 2003 |
| 6657490 |
Feedforward signal generation for combined amplifiers |
Dec. 2, 2003 |
| 6657492 |
System for estimating a non-linear characteristic of an amplifier |
Dec. 2, 2003 |
| 6657493 |
Distortion compensation apparatus and distortion compensation method |
Dec. 2, 2003 |
| 6658119 |
Audio signal cable with passive network |
Dec. 2, 2003 |
| 6646501 |
Power amplifier configuration |
Nov. 11, 2003 |
| 6646505 |
Power amplifier array with same type predistortion amplifier |
Nov. 11, 2003 |
| 6646506 |
Method for linearsing high-frequency amplifier |
Nov. 11, 2003 |
| 6647073 |
Linearisation and modulation device |
Nov. 11, 2003 |
| 6642785 |
Power linearizer of a CDMA system and method thereof |
Nov. 4, 2003 |
| 6642786 |
Piecewise polynomial predistortion method and apparatus for compensating nonlinear distortion of high power amplifier |
Nov. 4, 2003 |
| 6639466 |
Amplifier bias adjustment circuit to maintain high-output third-order intermodulation distortion performance |
Oct. 28, 2003 |
| 6633200 |
Management of internal signal levels and control of the net gain for a LINC amplifier |
Oct. 14, 2003 |
| 6630862 |
System for pre-distorting an input signal for a power amplifier using-non-orthogonal coordinates |
Oct. 7, 2003 |
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