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Class Information
Number: 330/260
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including differential amplifier > Having signal feedback means
Description: Subject matter wherein a portion of the electrical signal output energy is applied to the input of the amplifier.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4418321 |
Feedback amplifier or threshold value switch for a current feed differential stage |
Nov. 29, 1983 |
| 4409556 |
Amplifier arrangement with very low distortion |
Oct. 11, 1983 |
| 4398159 |
Switch mode - class B power amplifier |
Aug. 9, 1983 |
| 4396891 |
Gain control circuit |
Aug. 2, 1983 |
| 4395682 |
Differential output circuit |
Jul. 26, 1983 |
| 4393355 |
Operational amplifier |
Jul. 12, 1983 |
| 4380739 |
Electronic differential controller |
Apr. 19, 1983 |
| 4379268 |
Differential amplifier circuit |
Apr. 5, 1983 |
| 4379267 |
Low power differential amplifier |
Apr. 5, 1983 |
| 4375619 |
FET Operational amplifier with increased output swing |
Mar. 1, 1983 |
| 4371843 |
Semiconductor differential amplifier circuit with feedback bias control |
Feb. 1, 1983 |
| 4366446 |
Feedback linearization of cascode amplifier configurations |
Dec. 28, 1982 |
| 4365207 |
Integrated high frequency amplifier |
Dec. 21, 1982 |
| 4365206 |
Differential amplifier |
Dec. 21, 1982 |
| 4358739 |
Wide-band direct-current coupled transistor amplifier |
Nov. 9, 1982 |
| 4354162 |
Wide dynamic range control amplifier with offset correction |
Oct. 12, 1982 |
| 4342003 |
Operational amplifier with increased settling speed |
Jul. 27, 1982 |
| 4342006 |
Amplifier circuit for supplying load with output signal current proportional to input signal voltage |
Jul. 27, 1982 |
| 4335358 |
Class "B" type amplifier |
Jun. 15, 1982 |
| 4335359 |
Monolithically integrable lowpass filter circuit |
Jun. 15, 1982 |
| 4329656 |
High-speed voltage subtractor |
May. 11, 1982 |
| 4320351 |
Differential amplifying system with bootstrapping |
Mar. 16, 1982 |
| 4315223 |
CMOS Operational amplifier with improved frequency compensation |
Feb. 9, 1982 |
| 4306198 |
Filter circuit |
Dec. 15, 1981 |
| 4303891 |
Monolithic integrated circuit with frequency dependent amplification |
Dec. 1, 1981 |
| 4302726 |
Current sources |
Nov. 24, 1981 |
| 4301421 |
Direct-coupled amplifier with output offset regulation |
Nov. 17, 1981 |
| 4300102 |
Variable gain control circuit |
Nov. 10, 1981 |
| 4296383 |
Balancing amplifier |
Oct. 20, 1981 |
| 4295100 |
Microphone amplifier, in particular for telephone systems |
Oct. 13, 1981 |
| 4293823 |
Balanced input phonograph preamplifier circuit |
Oct. 6, 1981 |
| 4288754 |
Filter circuit |
Sep. 8, 1981 |
| 4287479 |
Operational amplifier circuit |
Sep. 1, 1981 |
| 4287477 |
Feedback arrangement |
Sep. 1, 1981 |
| 4274058 |
Amplifier with separate AC and DC feedback loops |
Jun. 16, 1981 |
| 4270092 |
Current controlling circuitry for logical circuit reference electric level circuitry |
May. 26, 1981 |
| 4264832 |
Feedback amplifier |
Apr. 28, 1981 |
| RE30587 |
Differential amplifier circuit |
Apr. 21, 1981 |
| 4253070 |
Feedback arrangement |
Feb. 24, 1981 |
| 4247789 |
Electronic circuitry for multiplying/dividing analog input signals |
Jan. 27, 1981 |
| 4232271 |
Instrumentation amplifier with extended common mode range |
Nov. 4, 1980 |
| 4232270 |
High gain differential amplifier with positive feedback |
Nov. 4, 1980 |
| 4227095 |
Deviation driver circuit |
Oct. 7, 1980 |
| 4223276 |
Voltage follower circuit |
Sep. 16, 1980 |
| 4219782 |
Unity gain amplifier for sourcing current to a capacitive load or the like |
Aug. 26, 1980 |
| 4216436 |
High gain differential amplifier |
Aug. 5, 1980 |
| 4215317 |
Compensated operational amplifier circuit |
Jul. 29, 1980 |
| 4201888 |
Remote playout telephone answering device |
May. 6, 1980 |
| 4197426 |
Remote playout telephone answering device |
Apr. 8, 1980 |
| 4188588 |
Circuitry with unbalanced long-tailed-pair connections of FET's |
Feb. 12, 1980 |
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