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Class Information
Number: 330/86
Name: Amplifiers > Signal feedback > Variable impedance in feedback path varied by separate control path
Description: Subject matter wherein the "signal feedback circuit means" has a variable impedance therein, which is varied by means of a control which may be a variable control voltage or a motor control means, the control to vary the variable impedance being derived, developed and applied by a path separate from that involving the variable impedance and the immediately associated signal transmission path.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7423481 |
Amplifier arrangement and amplifying method |
Sep. 9, 2008 |
| 7423482 |
Circuit configuration having a feedback operational amplifier |
Sep. 9, 2008 |
| 7417500 |
Control of an adjustable gain amplifier |
Aug. 26, 2008 |
| 7417499 |
Gain controlled amplifier and cascoded gain controlled amplifier based on the same |
Aug. 26, 2008 |
| 7414476 |
Sensor interface circuitry having adjustable gain and Q, and method for adjusting sensor interface circuitry gain and Q |
Aug. 19, 2008 |
| 7391260 |
Variable gain amplifier and variable gain amplifier module |
Jun. 24, 2008 |
| 7388428 |
Power amplifier with controllable feedback loop |
Jun. 17, 2008 |
| 7375584 |
Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit |
May. 20, 2008 |
| 7372329 |
Method and apparatus to remove the DC component of a feedback signal |
May. 13, 2008 |
| 7368987 |
Circuit configuration having a feedback operational amplifier |
May. 6, 2008 |
| 7358818 |
Optical receiver for an optical communication |
Apr. 15, 2008 |
| 7352238 |
dB-linear analog variable gain amplifier (VGA) realization system and method |
Apr. 1, 2008 |
| 7352242 |
Programmable gain trim circuit |
Apr. 1, 2008 |
| 7345546 |
Amplifier circuit and input circuit |
Mar. 18, 2008 |
| 7332963 |
Low noise amplifier |
Feb. 19, 2008 |
| 7327190 |
Differential amplifier arrangement |
Feb. 5, 2008 |
| 7323931 |
System and method for operating a feedback network |
Jan. 29, 2008 |
| 7323938 |
Amplifier circuit and light receiving apparatus |
Jan. 29, 2008 |
| 7279969 |
Signal amplification method and amplifier array |
Oct. 9, 2007 |
| 7279977 |
Integrated circuit with resistive network having reduced mismatch |
Oct. 9, 2007 |
| 7268628 |
Preamplifier |
Sep. 11, 2007 |
| 7265616 |
Charge amplifier |
Sep. 4, 2007 |
| 7262655 |
High bandwidth resistor |
Aug. 28, 2007 |
| 7256648 |
Variable feedback circuits and methods |
Aug. 14, 2007 |
| 7248107 |
Method of controlling a variable gain amplifier and electronic circuit |
Jul. 24, 2007 |
| 7245890 |
High frequency variable gain amplification device, control device, high frequency variable gain frequency-conversion device, and communication device |
Jul. 17, 2007 |
| 7245179 |
Auto gain controller |
Jul. 17, 2007 |
| 7209004 |
DB-linear variable gain amplifier (VGA) stage with a high broad band |
Apr. 24, 2007 |
| 7205845 |
Amplifier circuit for converting the current signal from an optical receiving element into a voltage signal |
Apr. 17, 2007 |
| 7196577 |
Amplifier with capacitor selection |
Mar. 27, 2007 |
| 7180374 |
Photodiode integrated circuit having multiple gain states |
Feb. 20, 2007 |
| 7180366 |
Data signal amplifier and processor with multiple signal gains for increased dynamic signal range |
Feb. 20, 2007 |
| 7173487 |
Power amplification circuit and communication device using the same |
Feb. 6, 2007 |
| 7164313 |
Method and apparatus for opening a feedback loop |
Jan. 16, 2007 |
| 7135376 |
Resistance dividing circuit and manufacturing method thereof |
Nov. 14, 2006 |
| 7132893 |
Selectable gain amplifier |
Nov. 7, 2006 |
| 7123098 |
Transimpedance amplifier with differential peak detector |
Oct. 17, 2006 |
| 7068107 |
Variable gain amplifier |
Jun. 27, 2006 |
| 7057454 |
Resistor and switch-minimized variable analog gain circuit |
Jun. 6, 2006 |
| 7054372 |
Digital transmission line tap circuit |
May. 30, 2006 |
| 7023280 |
Transimpedance amplifier |
Apr. 4, 2006 |
| 7019589 |
Transimpedance amplifier |
Mar. 28, 2006 |
| 7002408 |
Data signal amplifier and processor with multiple signal gains for increased dynamic signal range |
Feb. 21, 2006 |
| 6972619 |
Amplifier with a gain proportional to power source voltage |
Dec. 6, 2005 |
| 6958655 |
Variable gain amplifier circuit using variable impedance circuit |
Oct. 25, 2005 |
| 6958646 |
Autozeroing floating-gate amplifier |
Oct. 25, 2005 |
| 6958648 |
Programmable gain amplifier with glitch minimization |
Oct. 25, 2005 |
| 6946910 |
Configurable feedback path in an amplitude control system |
Sep. 20, 2005 |
| 6933786 |
Amplifier circuit and method |
Aug. 23, 2005 |
| 6909323 |
Variable gain amplifier |
Jun. 21, 2005 |
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