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Class Information
Number: 330/282
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means > Having feedback means acting as variable impedance
Description: Subject matter including a feedback means acting as a variable impedance to control the gain of the amplifier.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6285863 |
System and method for providing automatic gain control with high dynamic range |
Sep. 4, 2001 |
| 6285257 |
Feedback type variable gain amplifier |
Sep. 4, 2001 |
| 6278324 |
Analog amplifier with monotonic transfer function |
Aug. 21, 2001 |
| 6265942 |
Low power gain controlled amplifier with high dynamic range |
Jul. 24, 2001 |
| 6239659 |
Low power gain controlled amplifier with high dynamic range |
May. 29, 2001 |
| 6239655 |
Microphone amplifier with digital gain control |
May. 29, 2001 |
| 6225756 |
Power oscillator |
May. 1, 2001 |
| 6211737 |
Variable gain amplifier with improved linearity |
Apr. 3, 2001 |
| 6198349 |
Variable gain amplifier having a maximum attenuation-factor limiting resistor |
Mar. 6, 2001 |
| 6163219 |
Amplification circuit and integrated circuit having such and controlling method of the amplification circuit |
Dec. 19, 2000 |
| 6147554 |
Control signal amplification circuit |
Nov. 14, 2000 |
| 6140868 |
Master tuning circuit for adjusting a slave transistor to follow a master resistor |
Oct. 31, 2000 |
| 6137365 |
Variable-gain amplifier circuit and attenuator circuit |
Oct. 24, 2000 |
| 6128354 |
Data detection pre-amplifier circuit |
Oct. 3, 2000 |
| 6114686 |
Current-to-voltage conversion IC and a photoelectric conversion IC |
Sep. 5, 2000 |
| 6104245 |
Measuring amplifier |
Aug. 15, 2000 |
| 6104246 |
Variable gain RF amplifier with switchable bias injection and feedback |
Aug. 15, 2000 |
| 6081603 |
Method and apparatus for automatic gain control using a linear limiter circuit with voltage controlled resistors as a variable element |
Jun. 27, 2000 |
| 6078210 |
Internal voltage generating circuit |
Jun. 20, 2000 |
| 6072365 |
Audio level compression circuit |
Jun. 6, 2000 |
| 6072367 |
Electronic balance adjusting circuit |
Jun. 6, 2000 |
| 6064265 |
Gain control circuit for low-noise amplifier |
May. 16, 2000 |
| 6057736 |
Gain controlled amplifier |
May. 2, 2000 |
| 6055283 |
Data detection circuit |
Apr. 25, 2000 |
| 6052030 |
Low voltage variable gain amplifier with feedback |
Apr. 18, 2000 |
| 6028482 |
Wide dynamic range transimpedance amplifier circuit |
Feb. 22, 2000 |
| 5973566 |
Discrete step variable gain inverting amplifier with constant ratio between adjacent gains |
Oct. 26, 1999 |
| 5955919 |
Nonlinearity compensation in an electric signal processing circuit |
Sep. 21, 1999 |
| 5955925 |
Digital AGC circuit |
Sep. 21, 1999 |
| 5946608 |
Mixer circuit |
Aug. 31, 1999 |
| 5939938 |
Amplifier circuit with reduced DC power related turn-on and turn-off transients |
Aug. 17, 1999 |
| 5936470 |
Audio amplifier having linear gain control |
Aug. 10, 1999 |
| 5929706 |
Automatic gain control method and device |
Jul. 27, 1999 |
| 5912583 |
Continuous time filter with programmable bandwidth and tuning loop |
Jun. 15, 1999 |
| 5892800 |
Data detection circuit having a pre-amplifier circuit |
Apr. 6, 1999 |
| 5877612 |
Amplification of signals from high impedance sources |
Mar. 2, 1999 |
| 5854572 |
Compact structure of automatic gain control circuit |
Dec. 29, 1998 |
| 5821814 |
Negative feedback amplifier |
Oct. 13, 1998 |
| 5812030 |
Amplifier device capable of carrying out a stable amplifying operation without a gain variation |
Sep. 22, 1998 |
| 5808516 |
Linearization of voltage-controlled amplifier using MOSFET gain control circuit |
Sep. 15, 1998 |
| 5805019 |
Voltage gain amplifier for converting a single input to a differential output |
Sep. 8, 1998 |
| 5796310 |
Amplification circuit using wire-bonding for adjusting amplification factor |
Aug. 18, 1998 |
| 5793249 |
System for providing tight program/erase speeds that are insensitive to process variations |
Aug. 11, 1998 |
| 5793254 |
Monolithic amplifier with stable, high resistance feedback element and method for fabricating the same |
Aug. 11, 1998 |
| 5786730 |
Variable gain amplifier providing substantially uniform magnitude output signal |
Jul. 28, 1998 |
| 5744944 |
Programmable bandwidth voltage regulator |
Apr. 28, 1998 |
| 5734974 |
Selective call receivers with stepwise variable gain control |
Mar. 31, 1998 |
| 5721513 |
Gain controlled amplification circuit having differential amplifier |
Feb. 24, 1998 |
| 5703529 |
Amplifier circuit with reduced DC power related transients |
Dec. 30, 1997 |
| 5694366 |
OP amp circuit with variable resistance and memory system including same |
Dec. 2, 1997 |
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