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Class Information
Number: 330/281
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means > And significant control voltage developing means > With time constant means
Description: Subject matter including a circuit for filtering the control voltage, and wherein specific details or distinctive characteristics of such circuit are claimed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7336130 |
Attenuator, variable gain amplifier using the same, and electronic equipment |
Feb. 26, 2008 |
| 7233200 |
AGC circuit, AGC circuit gain control method, and program for the AGC circuit gain control method |
Jun. 19, 2007 |
| 7221226 |
Amplifying apparatus with automatic level controller |
May. 22, 2007 |
| 7123089 |
Power amplifier with pulse differentiating circuit |
Oct. 17, 2006 |
| 7065336 |
Analog base band unit for a RF receiver and method for using the same |
Jun. 20, 2006 |
| 6927632 |
Low distortion compression amplifier |
Aug. 9, 2005 |
| 6844780 |
Automatic gain control circuit |
Jan. 18, 2005 |
| 6795694 |
Automatic gain control system |
Sep. 21, 2004 |
| 6784742 |
Voltage amplifying circuit |
Aug. 31, 2004 |
| 6624700 |
Radio frequency power amplifier for cellular telephones |
Sep. 23, 2003 |
| 6621345 |
Gain control device for packet signal receiver |
Sep. 16, 2003 |
| 6586994 |
Variable gain and low noise amplifier for received signals in imaging apparata |
Jul. 1, 2003 |
| 6573786 |
Electronic devices comprising an audio amplifier and methods for controlling such electronic devices |
Jun. 3, 2003 |
| 6476677 |
Power amplifier saturation detection and compensation |
Nov. 5, 2002 |
| 6472938 |
Automatic level controlling circuit |
Oct. 29, 2002 |
| 6426677 |
Linearization bias circuit for BJT amplifiers |
Jul. 30, 2002 |
| 6420928 |
AC coupled pre-amplifier for burst signal |
Jul. 16, 2002 |
| 6388526 |
Methods and apparatus for high performance reception of radio frequency communication signals |
May. 14, 2002 |
| 6384686 |
Radio communication apparatus and radio frequency power amplifier |
May. 7, 2002 |
| 6288612 |
Radio communication apparatus and radio frequency power amplifier |
Sep. 11, 2001 |
| 6265939 |
Linear power detectors and methods for power amplifiers |
Jul. 24, 2001 |
| 6242981 |
AGC circuit |
Jun. 5, 2001 |
| 6208209 |
Automatic gain control circuit using a capacitor for minimizing digital coupling |
Mar. 27, 2001 |
| 6028469 |
Electric circuit arrangement comprising a switchable feedback branch |
Feb. 22, 2000 |
| 6014180 |
Automatic gain control loop circuit |
Jan. 11, 2000 |
| 5955927 |
RF power transistor control using collector current |
Sep. 21, 1999 |
| 5847609 |
Automatic gain control circuit for selectively providing an accurate linearity or a broad bandwidth |
Dec. 8, 1998 |
| 5697074 |
Dual rate power control loop for a transmitter |
Dec. 9, 1997 |
| 5663689 |
Method and apparatus for providing a high speed charge pump with low static error |
Sep. 2, 1997 |
| 5523575 |
Image identifying apparatus using an image sensor to extract false image data from a document image and discriminate the image by comparing the false image data to a predetermined pattern |
Jun. 4, 1996 |
| 5422602 |
Frequency discriminate leveler |
Jun. 6, 1995 |
| 5352988 |
Automatic gain controller |
Oct. 4, 1994 |
| 5339046 |
Temperature compensated variable gain amplifier |
Aug. 16, 1994 |
| 5337201 |
Information signal output apparatus with amplitude control having selected speed response |
Aug. 9, 1994 |
| 5329243 |
Noise adaptive automatic gain control circuit |
Jul. 12, 1994 |
| 5304947 |
Arrangement for eliminating offset errors in a power control circuit of a pulsed transmitter final amplifier |
Apr. 19, 1994 |
| 5296821 |
Method and apparatus for controlling transient responses in a power amplifier |
Mar. 22, 1994 |
| 5281925 |
RF amplifier providing reduced drive response rise times and fall times |
Jan. 25, 1994 |
| 5227737 |
Method and apparatus for adjusting the pole positions of a differentiating amplifier |
Jul. 13, 1993 |
| 5165017 |
Automatic gain control circuit in a feed forward configuration |
Nov. 17, 1992 |
| 5138277 |
Signal processing system having a very long time constant |
Aug. 11, 1992 |
| 5130668 |
Amplifier arrangement with time constant control |
Jul. 14, 1992 |
| 5128629 |
Method for controlling the output power of digital cellular telephones |
Jul. 7, 1992 |
| 5121076 |
Plural time constant signal control |
Jun. 9, 1992 |
| 5117201 |
Automatic gain control apparatus for digital variable-gain amplifier |
May. 26, 1992 |
| 5107225 |
High dynamic range closed loop automatic gain control circuit |
Apr. 21, 1992 |
| 4992758 |
Power amplifying apparatus for optical disk apparatus |
Feb. 12, 1991 |
| 4916406 |
Automatic gain control circuit |
Apr. 10, 1990 |
| 4912424 |
Audio amplifier with voltage limiting |
Mar. 27, 1990 |
| 4904954 |
Ultrasonic signal amplifier circuit and system of gain control thereof |
Feb. 27, 1990 |
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