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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 |
| 6075412 |
Linearization for power amplifiers |
Jun. 13, 2000 |
| 6072364 |
Adaptive digital predistortion for power amplifiers with real time modeling of memoryless complex gains |
Jun. 6, 2000 |
| 6072824 |
Circuit arrangement for reducing intermodulation in a bandpass filter system |
Jun. 6, 2000 |
| 6069530 |
Apparatus and method for linear power amplification |
May. 30, 2000 |
| 6069531 |
Feed forward amplifier improvement incorporating an automatic gain and phase controller |
May. 30, 2000 |
| 6069533 |
Circuit and method for automatically adjusting common mode rejection ratio |
May. 30, 2000 |
| 6066983 |
PCS multi-carrier linear power amplifier |
May. 23, 2000 |
| 6066984 |
Amplifier and amplifying method for amplifying a plurality of signals having different bands simultaneously |
May. 23, 2000 |
| 6061554 |
Electromagnetic interference suppressing device |
May. 9, 2000 |
| 6054894 |
Digital control of a linc linear power amplifier |
Apr. 25, 2000 |
| 6054895 |
Apparatus and method for pre-distortion correction of a power amplifier stage |
Apr. 25, 2000 |
| 6054896 |
Controller and associated methods for a linc linear power amplifier |
Apr. 25, 2000 |
| 6049703 |
Amplifier circuit and method for increasing linearity of the amplifier circuit |
Apr. 11, 2000 |
| 6049707 |
Broadband multicarrier amplifier system and method using envelope elimination and restoration |
Apr. 11, 2000 |
| 6046635 |
Dynamic predistortion compensation for a power amplifier |
Apr. 4, 2000 |
| 6046636 |
Device for amplifying signals |
Apr. 4, 2000 |
| 6040740 |
Audio transient suppression device |
Mar. 21, 2000 |
| 6037837 |
Feed forward amplifier |
Mar. 14, 2000 |
| 6029285 |
Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude |
Feb. 29, 2000 |
| 6032031 |
Receiver for suppressing intermodulation |
Feb. 29, 2000 |
| 6028477 |
Adaptive biasing in a power amplifier |
Feb. 22, 2000 |
| 6026285 |
Intermodulation distortion reduction circuit utilizing variable attenuation |
Feb. 15, 2000 |
| 6023611 |
Filter device for suppressing harmonics in radio frequency signals when dual frequencies exist |
Feb. 8, 2000 |
| 6018266 |
Radio frequency system having reflective diode linearizer with balanced tunable impedance loads |
Jan. 25, 2000 |
| 6016076 |
Method and apparatus for microwave predistorter linearizer with electronic tuning |
Jan. 18, 2000 |
| 6011434 |
Feed-forward amplifier |
Jan. 4, 2000 |
| 6002300 |
Control system for the linearization of an amplifier circuit |
Dec. 14, 1999 |
| 5999047 |
Linearizer for use with RF power amplifiers |
Dec. 7, 1999 |
| 5994957 |
Feed forward amplifier improvement |
Nov. 30, 1999 |
| 5990734 |
System and methods for stimulating and training a power amplifier during non-transmission events |
Nov. 23, 1999 |
| 5990738 |
Compensation system and methods for a linear power amplifier |
Nov. 23, 1999 |
| 5982233 |
Device and method for compensating phase distortion |
Nov. 9, 1999 |
| 5982234 |
Low noise arrangement or an amplifier |
Nov. 9, 1999 |
| 5977825 |
Electronic circuit for linearization of an amplifier |
Nov. 2, 1999 |
| 5977826 |
Cascaded error correction in a feed forward amplifier |
Nov. 2, 1999 |
| 5969571 |
Pulse duration amplifier system |
Oct. 19, 1999 |
| 5969572 |
Linear power amplifier and method for canceling intermodulation distortion signals |
Oct. 19, 1999 |
| 5966049 |
Broadband linearizer for power amplifiers |
Oct. 12, 1999 |
| 5963089 |
Semiconductor amplifying apparatus and communication terminal apparatus |
Oct. 5, 1999 |
| 5963090 |
Automatic predistortion adjusting circuit having stable non-linear characteristics regardless of input signal frequency |
Oct. 5, 1999 |
| 5963091 |
Article comprising a power amplifier with feed forward linearizer using a RLS parameter tracking algorithm |
Oct. 5, 1999 |
| 5959499 |
Predistortion system and method using analog feedback loop for look-up table training |
Sep. 28, 1999 |
| 5956410 |
Audio transmission line with energy storage network |
Sep. 21, 1999 |
| 5949283 |
Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier |
Sep. 7, 1999 |
| 5942939 |
Amplifier and method of canceling distortion by combining hyperbolic tangent and hyperbolic sine transfer functions |
Aug. 24, 1999 |
| 5939938 |
Amplifier circuit with reduced DC power related turn-on and turn-off transients |
Aug. 17, 1999 |
| 5939940 |
Low noise preamplifier for a magnetoresistive data transducer |
Aug. 17, 1999 |
| 5929703 |
Method and device for modeling AM-AM and AM-PM characteristics of an amplifier, and corresponding predistortion method |
Jul. 27, 1999 |
| 5929704 |
Control of RF error extraction using auto-calibrating RF correlator |
Jul. 27, 1999 |
| 5923215 |
Linearized amplifier |
Jul. 13, 1999 |
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