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Class Information
Number: 330/283
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means > Having feedback means acting as variable impedance > Having emitter degeneration
Description: Subject matter including a feedback means acting as a variable impedance in the common electrode of the amplifier to control the gain of the amplifier.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7432765 |
Variable gain amplifier, mixer and quadrature modulator using the same |
Oct. 7, 2008 |
| 7433656 |
Reducing flicker noise in two-stage amplifiers |
Oct. 7, 2008 |
| 7423487 |
Variable gain feedback amplifier circuit apparatus and method therefor |
Sep. 9, 2008 |
| 7378908 |
Variable gain differential amplifier, and variable degeneration impedance control device and method for use in the same |
May. 27, 2008 |
| 7319364 |
Amplifier circuit having improved linearity and frequency band using multiple gated transistor |
Jan. 15, 2008 |
| 7298213 |
Input impedance matching circuit for low noise amplifier |
Nov. 20, 2007 |
| 7292104 |
Variable gain amplifier |
Nov. 6, 2007 |
| 7233205 |
Transistor biasing independent of inductor voltage drop |
Jun. 19, 2007 |
| 7230490 |
Voltage to current converter and method for converting |
Jun. 12, 2007 |
| 7221227 |
Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver |
May. 22, 2007 |
| 7202743 |
High frequency amplifier |
Apr. 10, 2007 |
| 7167053 |
Integrated circuit amplifier device and method using FET tunneling gate current |
Jan. 23, 2007 |
| 7164318 |
Continuous variable-gain low-noise amplifier |
Jan. 16, 2007 |
| 7145395 |
Linear transconductance cell with wide tuning range |
Dec. 5, 2006 |
| 7123091 |
Darlington differential amplifier |
Oct. 17, 2006 |
| 7106138 |
Continuously variable gain radio frequency driver amplifier having linear in decibel gain control characteristics |
Sep. 12, 2006 |
| 7098737 |
Variable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this am |
Aug. 29, 2006 |
| 7095279 |
AC differential amplifier with reduced low corner frequency |
Aug. 22, 2006 |
| 7084704 |
Variable gain amplifier system |
Aug. 1, 2006 |
| 7057457 |
Low-noise amplifying circuit |
Jun. 6, 2006 |
| 6977552 |
Impedance matching low noise amplifier having a bypass switch |
Dec. 20, 2005 |
| 6972624 |
Low-voltage high dynamic range variable-gain amplifier |
Dec. 6, 2005 |
| 6972625 |
Variable transconductance variable gain amplifier utilizing a degenerated differential pair |
Dec. 6, 2005 |
| 6946908 |
Programmable radio frequency predistortion linearizer and method thereof |
Sep. 20, 2005 |
| 6933779 |
Variable gain low noise amplifier |
Aug. 23, 2005 |
| 6927633 |
High frequency circuit with thin film resistor |
Aug. 9, 2005 |
| 6914488 |
Broadband amplification apparatus for bandwidth expansion |
Jul. 5, 2005 |
| 6906592 |
Continuously variable gain radio frequency driver amplifier having linear in decibel gain control characteristics |
Jun. 14, 2005 |
| 6894563 |
Automatic control of amplifier gain using degeneration |
May. 17, 2005 |
| 6870425 |
System and method of amplifier gain control by variable bias and degeneration |
Mar. 22, 2005 |
| 6859105 |
Variable gain control circuit and integrated circuit device having the same |
Feb. 22, 2005 |
| 6801089 |
Continuous variable-gain low-noise amplifier |
Oct. 5, 2004 |
| 6795690 |
Full-duplex transceiver with distributed duplexing function |
Sep. 21, 2004 |
| 6784741 |
Amplifier |
Aug. 31, 2004 |
| 6744320 |
Variable transconductane variable gain amplifier utilizing a degenerated differential pair |
Jun. 1, 2004 |
| 6727755 |
High speed linear variable gain amplifier architecture |
Apr. 27, 2004 |
| 6703899 |
Quad switched gain circuit |
Mar. 9, 2004 |
| 6693492 |
Variable gain low-noise amplifier and method |
Feb. 17, 2004 |
| 6605996 |
Automatically gain controllable linear differential amplifier using variable degeneration resistor |
Aug. 12, 2003 |
| 6570446 |
Method and apparatus for improving the performance of electronic devices using cross-degeneration |
May. 27, 2003 |
| 6566963 |
Transformer-based low noise variable gain driver amplifier |
May. 20, 2003 |
| 6529078 |
Low-distortion transimpedance amplifier structures and methods |
Mar. 4, 2003 |
| 6512418 |
Amplifier |
Jan. 28, 2003 |
| 6509796 |
Variable transconductance variable gain amplifier utilizing a degenerated differential pair |
Jan. 21, 2003 |
| 6496071 |
Amplifier with adjustable voltage gain and method of operating the same |
Dec. 17, 2002 |
| 6452456 |
Fast-setting, low power, jammer insensitive, biasing apparatus and method for single-ended circuits |
Sep. 17, 2002 |
| 6392490 |
High-precision biasing circuit for a cascoded CMOS stage, particularly for low noise amplifiers |
May. 21, 2002 |
| 6388517 |
Input change-over type amplifier and frequency change-over type oscillator using the same |
May. 14, 2002 |
| 6310517 |
Microwave amplifier |
Oct. 30, 2001 |
| 6278326 |
Current mirror circuit |
Aug. 21, 2001 |
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