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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 |
| 5142240 |
Amplifier circuit with correction of amplitude and phase distortions |
Aug. 25, 1992 |
| 5140283 |
Time variant analog signal switching apparatus including switching transient avoidance |
Aug. 18, 1992 |
| 5138275 |
Predistortion linearizer for microwave power amplifiers |
Aug. 11, 1992 |
| 5138276 |
Distortion-compensated differential circuit |
Aug. 11, 1992 |
| 5132637 |
RF power amplifier system having improved distortion reduction |
Jul. 21, 1992 |
| 5132639 |
Predistorter for linearization of electronic and optical signals |
Jul. 21, 1992 |
| 5126687 |
Amplifier system for automatically minimizing distortion |
Jun. 30, 1992 |
| 5124665 |
Circuit for reducing distortion produced by an r.f. power amplifier |
Jun. 23, 1992 |
| 5123031 |
Control voltage generator in a transmitter arrangement for digitally modulated signals |
Jun. 16, 1992 |
| 5121077 |
Circuit for reducing distortion produced by an r.f. power amplifier |
Jun. 9, 1992 |
| 5119040 |
Method and apparatus for optimizing the performance of a power amplifier circuit |
Jun. 2, 1992 |
| 5119392 |
Second-order predistortion circuit for use with laser diode |
Jun. 2, 1992 |
| 5117197 |
High-power feed-forward microwave amplifier apparatus with out-of-band intermodulation product suppression |
May. 26, 1992 |
| 5113414 |
Predistortion arrangement for a digital transmission system |
May. 12, 1992 |
| 5111155 |
Distortion compensation means and method |
May. 5, 1992 |
| 5105164 |
High efficiency UHF linear power amplifier |
Apr. 14, 1992 |
| 5105165 |
Low distortion, low noise, amplifier |
Apr. 14, 1992 |
| 5105445 |
Predistortion arrangement for a digital transmission system |
Apr. 14, 1992 |
| 5105446 |
Digital method of correcting non-linearity in a transmission chain, and apparatus implementing the method |
Apr. 14, 1992 |
| 5095283 |
Amplifier circuit having feedback circuit |
Mar. 10, 1992 |
| 5093629 |
Amplifier circuit having second order signal cancellation |
Mar. 3, 1992 |
| 5091919 |
Transmitter arrangement for digitally modulated signals |
Feb. 25, 1992 |
| 5086278 |
Circuit element measuring method and apparatus |
Feb. 4, 1992 |
| 5077532 |
Feed forward distortion minimization circuit |
Dec. 31, 1991 |
| 5075635 |
Device for correcting the phase induced by the class C operation of the solid state amplifier and radar system using such a device |
Dec. 24, 1991 |
| 5068624 |
Amplifier |
Nov. 26, 1991 |
| 5066922 |
Stabilizing circuit for feedback RF amplifier |
Nov. 19, 1991 |
| 5065110 |
Feed-forward amplifier including phase correction |
Nov. 12, 1991 |
| 5055795 |
Traveling wave type transversal equalizer |
Oct. 8, 1991 |
| 5055799 |
Amplifier circuit with non-linear load resistance which increases amplifier forward gain at high frequency |
Oct. 8, 1991 |
| 5051704 |
Feedforward distortion cancellation circuit |
Sep. 24, 1991 |
| 5049832 |
Amplifier linearization by adaptive predistortion |
Sep. 17, 1991 |
| 5043673 |
Compensating circuit for a high frequency amplifier |
Aug. 27, 1991 |
| 5027082 |
Solid state RF power amplifier having improved efficiency and reduced distortion |
Jun. 25, 1991 |
| 5023565 |
Linear amplifier with automatic adjustment of feed forward loop gain and phase |
Jun. 11, 1991 |
| 5015965 |
Predistortion equalizer with resistive combiners and dividers |
May. 14, 1991 |
| 4999585 |
Circuit technique for cancelling non-linear capacitor-induced harmonic distortion |
Mar. 12, 1991 |
| 4992754 |
Predistorter for linearization of electronic and optical signals |
Feb. 12, 1991 |
| 4987378 |
Feedforward predistortion linearizer |
Jan. 22, 1991 |
| 4972159 |
Amplifier circuit more immune to fluctuation of reference voltage |
Nov. 20, 1990 |
| 4967164 |
Adaptive predistortion circuit |
Oct. 30, 1990 |
| 4956616 |
Muting circuit for audio amplifiers |
Sep. 11, 1990 |
| 4954787 |
Audio signal transmission system with noise suppression network |
Sep. 4, 1990 |
| 4943783 |
Feed forward distortion correction circuit |
Jul. 24, 1990 |
| 4929906 |
Amplifier linearization using down/up conversion |
May. 29, 1990 |
| 4928072 |
Amplifier having suppressed spurious frequency components |
May. 22, 1990 |
| 4926134 |
Gain monitoring of distortion cancellation amplifiers in a feedforward linear amplifier |
May. 15, 1990 |
| 4926136 |
Power amplifier combiner for improving linearity of an output |
May. 15, 1990 |
| 4912427 |
Power supply noise rejection technique for amplifiers |
Mar. 27, 1990 |
| 4902983 |
Nonlinear signal generating circuit and nonlinear compensating device using the same |
Feb. 20, 1990 |
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