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Class Information
Number: 330/141
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Time constant circuit in bias control circuit
Description: Subject matter wherein "the bias voltage control means" includes a circuit of resistive and reactive elements, usually of resistive and capacitive elements, which serves to filter or "smooth out" the D.C. bias voltage applied for control purposes to the amplifier device and wherein specific details or distinctive characteristics of such circuit are claimed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7408407 |
Low noise variable gain amplifier |
Aug. 5, 2008 |
| 7352244 |
Electronics parts for high frequency power amplifier |
Apr. 1, 2008 |
| 7339437 |
Ultra-wideband constant gain CMOS amplifier |
Mar. 4, 2008 |
| 7298208 |
Automatic level control circuit with improved recovery action |
Nov. 20, 2007 |
| 7298212 |
Automatic level control circuit with improved attack action |
Nov. 20, 2007 |
| 7233200 |
AGC circuit, AGC circuit gain control method, and program for the AGC circuit gain control method |
Jun. 19, 2007 |
| 7202748 |
Ultra-wideband constant gain CMOS amplifier |
Apr. 10, 2007 |
| 7138874 |
Two-stage amplifier |
Nov. 21, 2006 |
| 7123097 |
Ultra-wideband constant gain CMOS amplifier |
Oct. 17, 2006 |
| 6946914 |
Ultra-wideband constant gain CMOS amplifier |
Sep. 20, 2005 |
| 6844780 |
Automatic gain control circuit |
Jan. 18, 2005 |
| 6784742 |
Voltage amplifying circuit |
Aug. 31, 2004 |
| 6744313 |
Power amplifier driver and method of using |
Jun. 1, 2004 |
| 6693488 |
Apparatus and method for a fast bandwidth switching circuit in a power amplifier control circuit |
Feb. 17, 2004 |
| 6690232 |
Variable gain amplifier |
Feb. 10, 2004 |
| 6670850 |
Ultra-wideband constant gain CMOS amplifier |
Dec. 30, 2003 |
| 6621345 |
Gain control device for packet signal receiver |
Sep. 16, 2003 |
| 6621341 |
Diagnostic medical ultrasound systems having a method and circuitry for front-end gain control |
Sep. 16, 2003 |
| 6617931 |
Two-stage amplifier |
Sep. 9, 2003 |
| 6603350 |
Regulator device for controlling the power of a transmitter |
Aug. 5, 2003 |
| 6586994 |
Variable gain and low noise amplifier for received signals in imaging apparata |
Jul. 1, 2003 |
| 6549068 |
System and method for operating an RF power amplifier |
Apr. 15, 2003 |
| 6469577 |
Automatic level controlling circuit |
Oct. 22, 2002 |
| 6437643 |
Variable gain amplifier |
Aug. 20, 2002 |
| 6433633 |
Automatic gain control system with signal presence conditioning |
Aug. 13, 2002 |
| 6420928 |
AC coupled pre-amplifier for burst signal |
Jul. 16, 2002 |
| 6411161 |
AC coupling circuit |
Jun. 25, 2002 |
| 6388526 |
Methods and apparatus for high performance reception of radio frequency communication signals |
May. 14, 2002 |
| 6285253 |
Systems, methods, and circuits for reducing HUM modulation in amplifiers |
Sep. 4, 2001 |
| 6242981 |
AGC circuit |
Jun. 5, 2001 |
| 6166597 |
Method for feedback control of a controlled variable |
Dec. 26, 2000 |
| 5977833 |
Power supply circuit for a power amplifier of a mobile radio communication terminal |
Nov. 2, 1999 |
| 5898337 |
Output signal level control circuit using different detecting sections in different output signal levels |
Apr. 27, 1999 |
| 5724652 |
Method for acquiring a rapid automatic gain control (AGC) response in a narrow band receiver |
Mar. 3, 1998 |
| 5697074 |
Dual rate power control loop for a transmitter |
Dec. 9, 1997 |
| 5617060 |
Method and apparatus for automatic gain control and DC offset cancellation in quadrature receiver |
Apr. 1, 1997 |
| 5469115 |
Method and apparatus for automatic gain control in a digital receiver |
Nov. 21, 1995 |
| 5422602 |
Frequency discriminate leveler |
Jun. 6, 1995 |
| 5378996 |
RF power amplifier control |
Jan. 3, 1995 |
| 5371473 |
Thermally stable ALC for pulsed output amplifier |
Dec. 6, 1994 |
| 5352988 |
Automatic gain controller |
Oct. 4, 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 |
| 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 |
| 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 |
| 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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