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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:
1 2 3

Patent Number Title Of Patent Date Issued
8644777 System and method for power amplifier over-voltage protection Feb. 4, 2014
8395444 Electronic circuit Mar. 12, 2013
8390383 Amplifier for receiving intermittent optical signal Mar. 5, 2013
8233857 Detector with bandwidth compensation Jul. 31, 2012
8175562 Automatic gain control for enhanced bit error rate performance May. 8, 2012
7961044 Amplifier Jun. 14, 2011
7741905 Automatic gain control circuit Jun. 22, 2010
7711333 Detector with complementary response slope May. 4, 2010
7671680 Electronic circuit Mar. 2, 2010
7605652 Loop gain equalizer for RF power amplifier Oct. 20, 2009
7546098 Control system with selective open-loop operation Jun. 9, 2009
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

1 2 3

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