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Class Information
Number: 330/290
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including d.c. feedback bias control for stabilization
Description: Subject matter with feedback circuit for direct currents, for the purpose of operating point stabilization as compensating for changes in temperature, aging, etc., of the semiconductor device, or devices, which may include means such as bypass capacitors to eliminate signal feedback.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5986509 |
Transistor amplifier stage |
Nov. 16, 1999 |
| 5986840 |
Amplifier with capacitive feedback for driving a magneto-resistive head |
Nov. 16, 1999 |
| 5973565 |
DC bias feedback circuit for MESFET bias stability |
Oct. 26, 1999 |
| 5969574 |
Low voltage current sense amplifier |
Oct. 19, 1999 |
| 5963096 |
Amplifier circuit |
Oct. 5, 1999 |
| 5912584 |
Analog signal processing device and correlation computing device |
Jun. 15, 1999 |
| 5883542 |
Arrangement for reducing and stabilizing the amplification of a Darlington-coupled output stage |
Mar. 16, 1999 |
| 5854718 |
Record amplifying circuit for respectively serially and differentially driving sets of series-connected sound and video record heads |
Dec. 29, 1998 |
| 5854578 |
Active circuit having a temperature stable bias |
Dec. 29, 1998 |
| 5793255 |
Tuned RF amplifier |
Aug. 11, 1998 |
| 5760651 |
Inductorless voltage biasing circuit for and Ac-coupled amplifier |
Jun. 2, 1998 |
| 5717361 |
DC feedback common emitter type amplifier circuit having stable gain irrespective of power supply voltage |
Feb. 10, 1998 |
| 5705953 |
Device bias based supplemental amplification |
Jan. 6, 1998 |
| 5701103 |
Amplifying circuit with DC voltage feedback to base terminal for magnetic record and playback apparatus |
Dec. 23, 1997 |
| 5691663 |
Single-ended supply preamplifier with high power supply rejection ratio |
Nov. 25, 1997 |
| 5635874 |
Stable distortion amplifier for audio signals |
Jun. 3, 1997 |
| 5625295 |
Bipolar transistor circuit capable of high precision measurement of current amplification factor |
Apr. 29, 1997 |
| 5612649 |
Inverter amplifier circuits |
Mar. 18, 1997 |
| 5548248 |
RF amplifier circuit |
Aug. 20, 1996 |
| 5532648 |
Radio frequency amplifiers with compensation signal to accommodate changes in the conduction point due to temperature changes |
Jul. 2, 1996 |
| 5508656 |
Amplifier with offset correction |
Apr. 16, 1996 |
| 5497125 |
Current sense circuit apparatus for power amplifier control |
Mar. 5, 1996 |
| 5495214 |
Method and apparatus for controlling the operating point of an amplifier stage |
Feb. 27, 1996 |
| 5426395 |
Method and apparatus for protecting power amplifiers from excessive operating power levels |
Jun. 20, 1995 |
| 5363056 |
Circuit for linearization of amplified electronic signals |
Nov. 8, 1994 |
| 5361042 |
Compensated offset voltage, low gain, high bandwidth, full swing, wide common mode range, CMOS differential voltage amplifier |
Nov. 1, 1994 |
| 5347231 |
Low noise charge sensitive preamplifier DC stabilized without a physical resistor |
Sep. 13, 1994 |
| 5345191 |
Broad-band amplifier |
Sep. 6, 1994 |
| 5341108 |
Amplifier biasing circuit |
Aug. 23, 1994 |
| 5325073 |
Amplifying apparatus with ac/dc feedback circuit |
Jun. 28, 1994 |
| 5317282 |
Tetrode biasing circuit |
May. 31, 1994 |
| 5311147 |
High impedance output driver stage and method therefor |
May. 10, 1994 |
| 5304941 |
Sensor detection signal extracting circuit with offset voltage cancelling ability |
Apr. 19, 1994 |
| 5298869 |
Constant current and constant voltage regulating circuit for common-gate or common-base transistor devices |
Mar. 29, 1994 |
| 5283477 |
Common driver circuit |
Feb. 1, 1994 |
| 5237332 |
Receiver distortion correction circuit and method |
Aug. 17, 1993 |
| 5237261 |
Voltage step up regulator |
Aug. 17, 1993 |
| 5233312 |
DC feedback circuit using sample and hold circuits |
Aug. 3, 1993 |
| 5218323 |
Transistor direct-coupled amplifier |
Jun. 8, 1993 |
| 5175749 |
Apparatus and method for DC offset correction in a receiver |
Dec. 29, 1992 |
| 5138277 |
Signal processing system having a very long time constant |
Aug. 11, 1992 |
| 5124667 |
Wideband amplifier having separate outputs |
Jun. 23, 1992 |
| 5034702 |
Amplifying circuit including a bias circuit for independently determining a drain current and a drain voltage |
Jul. 23, 1991 |
| 5017887 |
High frequency IC power amplifier |
May. 21, 1991 |
| 4912431 |
Control amplifier |
Mar. 27, 1990 |
| 4912430 |
Current source as a microwave biasing element |
Mar. 27, 1990 |
| 4897616 |
Wide band amplifier with current mirror feedback to bias circuit |
Jan. 30, 1990 |
| 4894862 |
Signal compression circuit, particularly for a telephone set |
Jan. 16, 1990 |
| 4891604 |
High speed low input current voltage follower stage |
Jan. 2, 1990 |
| 4888561 |
Amplifier and display using the former |
Dec. 19, 1989 |
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