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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 |
| 4187472 |
Amplifier employing matched transistors to provide linear current feedback |
Feb. 5, 1980 |
| 4184176 |
Amplifier having different low-frequency and high-frequency feedback networks |
Jan. 15, 1980 |
| 4180780 |
Input decoupling circuit for transistor differential amplifier |
Dec. 25, 1979 |
| 4177432 |
Multi output differential amplifier |
Dec. 4, 1979 |
| 4163948 |
Filter for digital-to-analog converter |
Aug. 7, 1979 |
| 4163197 |
Audio-frequency power amplifier |
Jul. 31, 1979 |
| 4157512 |
Electronic circuitry having transistor feedbacks and lead networks compensation |
Jun. 5, 1979 |
| 4146845 |
Audio amplifier output circuit |
Mar. 27, 1979 |
| 4139825 |
Audio frequency amplifier |
Feb. 13, 1979 |
| 4139738 |
Multiplex decoder having a distortion-free differential amplifier |
Feb. 13, 1979 |
| 4137506 |
Compound transistor circuitry |
Jan. 30, 1979 |
| 4119801 |
Mode switching and voltage regulator circuitry for a telephone answering device |
Oct. 10, 1978 |
| 4097824 |
Variable equalizer |
Jun. 27, 1978 |
| 4092611 |
Adaptively biased differential operational amplifier for photo diode |
May. 30, 1978 |
| 4088962 |
Self biasing differential amplifier |
May. 9, 1978 |
| 4087758 |
Reference voltage source circuit |
May. 2, 1978 |
| 4085379 |
Amplifier for floating voltage source |
Apr. 18, 1978 |
| 4079332 |
High gain differential amplifier |
Mar. 14, 1978 |
| 4078206 |
Differential amplifier |
Mar. 7, 1978 |
| 4077012 |
Amplifier devices |
Feb. 28, 1978 |
| 4069461 |
Amplifier circuit having two negative feedback circuits |
Jan. 17, 1978 |
| 4044313 |
Protective network for an insulated-gate field-effect (IGFET) differential amplifier |
Aug. 23, 1977 |
| 4042886 |
High input impedance amplifier circuit having temperature stable quiescent operating levels |
Aug. 16, 1977 |
| 4032856 |
Drift compensated amplifier, particularly for measuring signals |
Jun. 28, 1977 |
| RE29286 |
Power amplifier with a bootstrapped driver stage |
Jun. 28, 1977 |
| 4032855 |
Phonograph preamplifier network with infrasonic cutoff response |
Jun. 28, 1977 |
| 4030043 |
Generalized operational amplifier |
Jun. 14, 1977 |
| RE29217 |
Digital circuit |
May. 10, 1977 |
| 3997850 |
Floating electrical output circuit |
Dec. 14, 1976 |
| 3991380 |
Complementary field effect transistor differential amplifier |
Nov. 9, 1976 |
| 3984780 |
CMOS voltage controlled current source |
Oct. 5, 1976 |
| 3983334 |
Matrix and equalizer circuit with gain control |
Sep. 28, 1976 |
| 3983502 |
Bridge-output amplifier with direct-coupled differential-mode feedback |
Sep. 28, 1976 |
| 3970923 |
Apparatus for measuring sheet resistivity of semiconductor materials and diffused layers |
Jul. 20, 1976 |
| 3969636 |
Charge sensing circuit for charge transfer devices |
Jul. 13, 1976 |
| 3969682 |
Circuit for dynamic control of phase shift |
Jul. 13, 1976 |
| 3955149 |
Differential amplifier having active feedback circuitry |
May. 4, 1976 |
| 3949317 |
Fast recovery limiting and phase inverting amplifier |
Apr. 6, 1976 |
| 3947704 |
Low resistance microcurrent regulated current source |
Mar. 30, 1976 |
| 3931583 |
Wideband differential amplifier |
Jan. 6, 1976 |
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