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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 |
| 6396345 |
Phase and amplitude detector and method of determining errors |
May. 28, 2002 |
| 6396350 |
Power booster method and apparatus for improving the performance of radio frequency linear power amplifiers |
May. 28, 2002 |
| 6392480 |
Alternating gain and phase control system and method |
May. 21, 2002 |
| 6392481 |
Method and apparatus for improved fed forward amplification |
May. 21, 2002 |
| 6392482 |
Method for linearizing, over a wide frequency band a transmission chain comprising a power amplifier |
May. 21, 2002 |
| 6392483 |
Feed-forward amplifier |
May. 21, 2002 |
| 6392491 |
High-frequency amplifier and amplification element |
May. 21, 2002 |
| 6393259 |
Amplifier circuit and transceiver |
May. 21, 2002 |
| 6393372 |
Automated frequency stepping noise measurement system |
May. 21, 2002 |
| 6388513 |
Amplifier measurement and modeling processes for use in generating predistortion parameters |
May. 14, 2002 |
| 6388518 |
Distortion compensation apparatus |
May. 14, 2002 |
| 6384681 |
Swept performance monitor for measuring and correcting RF power amplifier distortion |
May. 7, 2002 |
| 6385436 |
Distortion compensation circuit |
May. 7, 2002 |
| 6377116 |
Pre-distorter and corresponding method for deriving same |
Apr. 23, 2002 |
| 6377118 |
Linearizer for power amplifier |
Apr. 23, 2002 |
| 6377119 |
Feedback cancellation improvements |
Apr. 23, 2002 |
| 6366177 |
High-efficiency power modulators |
Apr. 2, 2002 |
| 6359507 |
Method and apparatus for an automatic predistortion system |
Mar. 19, 2002 |
| 6359508 |
Distortion detection apparatus for controlling predistortion, carrier cancellation and feed-forward cancellation in linear RF power amplifiers |
Mar. 19, 2002 |
| 6359509 |
Balanced error correction amplifier and method of removing distortion from an amplified signal |
Mar. 19, 2002 |
| 6356146 |
Amplifier measurement and modeling processes for use in generating predistortion parameters |
Mar. 12, 2002 |
| 6353360 |
Linearized power amplifier based on active feedforward-type predistortion |
Mar. 5, 2002 |
| 6348838 |
Optimal power combining for balanced error correction amplifier |
Feb. 19, 2002 |
| 6346853 |
Predistortion linearizer circuit |
Feb. 12, 2002 |
| 6346854 |
Amplifier circuit with reduced DC power related turn-on and turn-off transients |
Feb. 12, 2002 |
| 6340917 |
Broad frequency band linearization device |
Jan. 22, 2002 |
| 6337599 |
Predistortion linearizer for power amplifier |
Jan. 8, 2002 |
| 6335660 |
Pre/post-distortion circuit and method, particularly for microwave radio-frequency systems |
Jan. 1, 2002 |
| 6335767 |
Broadcast transmission system with distributed correction |
Jan. 1, 2002 |
| 6333676 |
Control method and control arrangement |
Dec. 25, 2001 |
| 6326843 |
Analog reflective predistorter for power amplifiers |
Dec. 4, 2001 |
| 6326844 |
Amplifier apparatus with transient recovery aid |
Dec. 4, 2001 |
| 6326845 |
Feedforward amplifier |
Dec. 4, 2001 |
| 6320463 |
Adaptive digital pre-correction of nonlinearities introduced by power amplifiers |
Nov. 20, 2001 |
| 6316983 |
Predistortion circuit |
Nov. 13, 2001 |
| 6316993 |
Analog circuitry for start-up glitch suppression |
Nov. 13, 2001 |
| 6316994 |
Response linearizing circuit, particularly for microwave radiofrequency systems, and method of linearizing the output of an apparatus |
Nov. 13, 2001 |
| 6313701 |
External optical modulation system comprising a predistorter |
Nov. 6, 2001 |
| 6313702 |
Phase correction amplifier and a feed-forward amplifier using the same |
Nov. 6, 2001 |
| 6313703 |
Use of antiphase signals for predistortion training within an amplifier system |
Nov. 6, 2001 |
| 6314142 |
Pre-distortion for a non-linear transmission path in the high frequency range |
Nov. 6, 2001 |
| 6310516 |
Attenuation compensation in amplification for a distribution network |
Oct. 30, 2001 |
| 6307435 |
High power amplifier linearization method using modified linear-log model predistortion |
Oct. 23, 2001 |
| 6307436 |
Predistortion type linearizer with a resonant circuit and common gate FET |
Oct. 23, 2001 |
| 6304140 |
Digital predistortion for amplifiers |
Oct. 16, 2001 |
| RE37407 |
Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier |
Oct. 16, 2001 |
| 6298096 |
Method and apparatus for determination of predistortion parameters for a quadrature modulator |
Oct. 2, 2001 |
| 6292055 |
Electronic apparatus comprising a power amplifier |
Sep. 18, 2001 |
| 6288606 |
Linear power amplifier arrangement and method for its operation |
Sep. 11, 2001 |
| 6288610 |
Method and apparatus for correcting signals, apparatus for compensating for distortion, apparatus for preparing distortion compensating data, and transmitter |
Sep. 11, 2001 |
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