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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 |
| 5351011 |
Low noise, low distortion MOS amplifier circuit |
Sep. 27, 1994 |
| 5347529 |
Method for generating a distortion-free, frequency-modulated optical signal and apparatus for the implementation of such a method |
Sep. 13, 1994 |
| 5334947 |
Logic enhanced noise gate |
Aug. 2, 1994 |
| 5329243 |
Noise adaptive automatic gain control circuit |
Jul. 12, 1994 |
| 5329244 |
Linear compensating circuit |
Jul. 12, 1994 |
| 5327096 |
Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier |
Jul. 5, 1994 |
| 5321710 |
Predistortion method and apparatus for laser linearization |
Jun. 14, 1994 |
| 5311446 |
Signal processing system for sensing a periodic signal in the presence of another interfering signal |
May. 10, 1994 |
| 5307025 |
Audio power amplifier with noise prevention at turn-on and turn-off |
Apr. 26, 1994 |
| 5304944 |
High frequency linearizer |
Apr. 19, 1994 |
| 5304945 |
Low-distortion feed-forward amplifier |
Apr. 19, 1994 |
| 5300892 |
Audio signal amplifier circuit |
Apr. 5, 1994 |
| 5291148 |
Gain linearization with coplanar waveguide |
Mar. 1, 1994 |
| 5287069 |
Constant-amplitude wave combination type amplifier |
Feb. 15, 1994 |
| 5282072 |
Shunt-expansive predistortion linearizers for optical analog transmitters |
Jan. 25, 1994 |
| 5278519 |
Method and apparatus for controlling RF spectral splatter into adjacent channels when activating an RF transmitter |
Jan. 11, 1994 |
| 5266906 |
Linear amplifier performing distortion compensation control |
Nov. 30, 1993 |
| 5264807 |
High frequency power amplifier with high efficiency and low distortion |
Nov. 23, 1993 |
| 5262734 |
Amplification systems |
Nov. 16, 1993 |
| 5258722 |
Amplifier circuit with distortion cancellation |
Nov. 2, 1993 |
| 5252930 |
Predistorter for linearization of electronic and optical signals |
Oct. 12, 1993 |
| 5250911 |
Single-ended and differential transistor amplifier circuits with full signal modulation compensation techniques which are technology independent |
Oct. 5, 1993 |
| 5237288 |
RF power amplifier linearization |
Aug. 17, 1993 |
| 5227736 |
Second-order predistorter |
Jul. 13, 1993 |
| 5221908 |
Wideband integrated distortion equalizer |
Jun. 22, 1993 |
| 5216376 |
Pulse duration amplifier system having distortion reduction |
Jun. 1, 1993 |
| 5212814 |
Automatic output power controller |
May. 18, 1993 |
| 5208551 |
Noise reduction circuit with a main signal path and an auxiliary signal path having a high-pass filter characteristic |
May. 4, 1993 |
| 5204881 |
System for set-up of transmitters in high capacity digital radio links |
Apr. 20, 1993 |
| 5193224 |
Adaptive phase control for a power amplifier predistorter |
Mar. 9, 1993 |
| 5191298 |
Isolation amplifier circuit |
Mar. 2, 1993 |
| 5191597 |
Method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
Mar. 2, 1993 |
| 5182524 |
Method and apparatus for stabilizing pulsed microwave amplifiers |
Jan. 26, 1993 |
| 5175879 |
Linear amplifier with feedback path and phase error compensation |
Dec. 29, 1992 |
| 5172068 |
Third-order predistortion linearization circuit |
Dec. 15, 1992 |
| 5172072 |
High efficiency harmonic injection power amplifier |
Dec. 15, 1992 |
| 5170495 |
Controlling clipping in a microwave power amplifier |
Dec. 8, 1992 |
| 5166637 |
Distortion cancellation amplifier system |
Nov. 24, 1992 |
| 5164678 |
Process for compensating nonlinearities in an amplifier circuit |
Nov. 17, 1992 |
| 5164681 |
Voltage-current conversion circuit |
Nov. 17, 1992 |
| 5162748 |
Switchable FET distortion generator |
Nov. 10, 1992 |
| 5159284 |
Noise reduction circuit with a main signal path and an auxiliary signal path having a high-pass filter characteristic |
Oct. 27, 1992 |
| 5157345 |
Apparatus and method for reducing distortion in amplification |
Oct. 20, 1992 |
| 5157346 |
RF wideband high power amplifier |
Oct. 20, 1992 |
| 5155448 |
Feed-forward amplifier having increased compression point |
Oct. 13, 1992 |
| 5151664 |
Low-distortion radio-frequency amplifying apparatus |
Sep. 29, 1992 |
| 5150072 |
Distortion correction for an amplifier system |
Sep. 22, 1992 |
| 5148117 |
Adaptive feed-forward method and apparatus for amplifier noise reduction |
Sep. 15, 1992 |
| 5146177 |
Balanced reflective nonlinear processor using FETs |
Sep. 8, 1992 |
| 5142164 |
Subharomic noise reduction circuit |
Aug. 25, 1992 |
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