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Class Information
Number: 330/293
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including signal feedback means > Having negative feedback
Description: Subject matter wherein the signal feedback which is superimposed on the input signal has at least one component thereof opposite in phase to the input signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4495472 |
Stable fast-settling voltage reference buffer amplifier |
Jan. 22, 1985 |
| 4481462 |
Amplitude control system |
Nov. 6, 1984 |
| 4476442 |
Amplifier with distortion cancellation |
Oct. 9, 1984 |
| 4460875 |
Negative feedback amplifiers including directional couplers |
Jul. 17, 1984 |
| 4459553 |
D.C. Stabilization circuit for a follower-type amplifier |
Jul. 10, 1984 |
| 4454478 |
Gain-controlled amplifier |
Jun. 12, 1984 |
| 4441085 |
Signal amplifying apparatus |
Apr. 3, 1984 |
| 4420725 |
Wide-bandwidth low-distortion amplifier |
Dec. 13, 1983 |
| 4354163 |
High voltage buffer amplifier |
Oct. 12, 1982 |
| 4349788 |
Transient intermodulation distortion limiting circuit for an amplifier system |
Sep. 14, 1982 |
| 4345216 |
Compensation of base-current-related error in current mirror amplifier circuitry |
Aug. 17, 1982 |
| 4342967 |
High voltage, high frequency amplifier |
Aug. 3, 1982 |
| 4342006 |
Amplifier circuit for supplying load with output signal current proportional to input signal voltage |
Jul. 27, 1982 |
| 4340869 |
Amplifier for use in a line circuit |
Jul. 20, 1982 |
| 4335361 |
Variable gain amplifier |
Jun. 15, 1982 |
| 4326170 |
High power and/or high voltage switching operational amplifier |
Apr. 20, 1982 |
| 4324950 |
Amplifier for driving electrostatic loudspeakers |
Apr. 13, 1982 |
| 4321552 |
Amplifier comprising a first and a second amplifier element |
Mar. 23, 1982 |
| 4306200 |
Selective amplifier |
Dec. 15, 1981 |
| 4290027 |
Fail-safe active bandpass filter using a modified twin-T filter |
Sep. 15, 1981 |
| 4287477 |
Feedback arrangement |
Sep. 1, 1981 |
| 4286227 |
Transistor amplifying circuit for preventing the operation of an amplifying transistor in the quasi-saturation region |
Aug. 25, 1981 |
| 4284960 |
Photo-feedback preamplifier circuit |
Aug. 18, 1981 |
| 4278946 |
Current scaling circuitry |
Jul. 14, 1981 |
| 4274016 |
Voltage-to-current converter |
Jun. 16, 1981 |
| 4268798 |
High performance summing amplifier |
May. 19, 1981 |
| 4264874 |
Low voltage CMOS amplifier |
Apr. 28, 1981 |
| 4263564 |
Wide-band transistorized amplifier |
Apr. 21, 1981 |
| 4259643 |
Current gain amplifier cell |
Mar. 31, 1981 |
| 4253070 |
Feedback arrangement |
Feb. 24, 1981 |
| 4246544 |
Bias circuit for a linear amplifier |
Jan. 20, 1981 |
| 4236119 |
Monolithic wideband amplifier |
Nov. 25, 1980 |
| 4218659 |
Amplifier circuit for a hall-effect head |
Aug. 19, 1980 |
| 4197511 |
Linear load MOS transistor circuit |
Apr. 8, 1980 |
| 4193040 |
High-voltage amplifier with low output impedance |
Mar. 11, 1980 |
| 4187472 |
Amplifier employing matched transistors to provide linear current feedback |
Feb. 5, 1980 |
| 4185249 |
Bipolar signal to current converter |
Jan. 22, 1980 |
| 4184176 |
Amplifier having different low-frequency and high-frequency feedback networks |
Jan. 15, 1980 |
| 4177433 |
Reel motor preamplifier |
Dec. 4, 1979 |
| 4174503 |
Modular low noise preamplifier |
Nov. 13, 1979 |
| 4147992 |
Amplifier circuit having a high degree of common mode rejection |
Apr. 3, 1979 |
| 4146846 |
Amplifier having a high frequency boost network |
Mar. 27, 1979 |
| RE29844 |
Unit transistor amplifier with matched input and output impedances |
Nov. 21, 1978 |
| 4112387 |
Bias circuit |
Sep. 5, 1978 |
| 4105943 |
Integrated amplifier with negative feedback |
Aug. 8, 1978 |
| 4103248 |
Voltage follower circuit |
Jul. 25, 1978 |
| 4097815 |
Amplifying circuit |
Jun. 27, 1978 |
| 4096444 |
Active integrated circuit |
Jun. 20, 1978 |
| 4095189 |
Electronic power amplifier for delivering a constant power into a load impedance |
Jun. 13, 1978 |
| 4090149 |
Integrated degenerative amplifier |
May. 16, 1978 |
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