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Class Information
Number: 455/249.1
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Local control of receiver operation > Gain control > Automatic > Variable attenuator type
Description: Subject matter comprising a circuit that absorbs part of the received carrier wave and transmits the remainder with a minimum of distortion or delay, the amount absorbed being variable.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7599674 |
Overload protection for receiver front end |
Oct. 6, 2009 |
| 7583945 |
Amplifier with improved noise performance and extended gain control range |
Sep. 1, 2009 |
| 7561863 |
Automatic gain control device |
Jul. 14, 2009 |
| 7546101 |
Variable attenuation of broadband differential signals using PIN diodes |
Jun. 9, 2009 |
| 7542748 |
Signal processing circuit comprising an attenuating unit, a detecting unit, and an attenuation rate setting unit |
Jun. 2, 2009 |
| 7539509 |
Small signal threshold and proportional gain distributed digital communications |
May. 26, 2009 |
| 7515888 |
Systems and method for a highly integrated, multi-mode tuner |
Apr. 7, 2009 |
| 7505748 |
Linear voltage controlled variable attenuator with linear DB/V gain slope |
Mar. 17, 2009 |
| 7454182 |
Attenuator with switch function and mobile telephone terminal device using the same |
Nov. 18, 2008 |
| 7409197 |
Transceiver with receive path overload protection and method |
Aug. 5, 2008 |
| 7310505 |
Attenuation control for tuners |
Dec. 18, 2007 |
| 7289777 |
Power control for non-constant envelope modulation |
Oct. 30, 2007 |
| 7280618 |
Digital baseband receiver including a high pass filter compensation module for suppressing group delay variation distortion incurred due to analog high pass filter deficiencies |
Oct. 9, 2007 |
| 7254421 |
Configurable wireless computer communication attenuation device |
Aug. 7, 2007 |
| 7245895 |
Attenuator with switch function and mobile telephone terminal device using the same |
Jul. 17, 2007 |
| 7184731 |
Variable attenuator system and method |
Feb. 27, 2007 |
| 7130602 |
Dynamically programmable receiver |
Oct. 31, 2006 |
| 7127224 |
Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency |
Oct. 24, 2006 |
| 7116958 |
Interference rejection in a radio receiver |
Oct. 3, 2006 |
| 7110735 |
Automatic gain control system |
Sep. 19, 2006 |
| 7107030 |
Transmitter and a modulator therefor |
Sep. 12, 2006 |
| 7103377 |
Small signal threshold and proportional gain distributed digital communications |
Sep. 5, 2006 |
| 7103335 |
Receiver used in spread spectrum communication system |
Sep. 5, 2006 |
| 7039377 |
Switchable gain amplifier |
May. 2, 2006 |
| 7019642 |
Wide area multipurpose tracking system |
Mar. 28, 2006 |
| 6978117 |
RF AGC amplifier system for satellite/terrestrial radio receiver |
Dec. 20, 2005 |
| 6975845 |
Direct conversion receiver architecture |
Dec. 13, 2005 |
| 6944437 |
Electronically programmable multimode circuit |
Sep. 13, 2005 |
| 6941122 |
Circuit for compensating temperature of automatic gain control circuit |
Sep. 6, 2005 |
| 6937846 |
Pin diode circuit arrangement |
Aug. 30, 2005 |
| 6873832 |
Timing based LNA gain adjustment in an RF receiver to compensate for intermodulation interference |
Mar. 29, 2005 |
| 6862441 |
Transmitter filter arrangement for multiband mobile phone |
Mar. 1, 2005 |
| 6828873 |
Integrated high frequency circuit for affecting the amplitude of signals |
Dec. 7, 2004 |
| 6816739 |
Radio system attenuator for an antenna |
Nov. 9, 2004 |
| 6785524 |
Device and method for controlling the amplitude of signals |
Aug. 31, 2004 |
| 6769133 |
Termination circuitry for dual forward and reverse test points for amplifiers |
Jul. 27, 2004 |
| 6738609 |
Receiver and method of receiving |
May. 18, 2004 |
| 6735423 |
Method and apparatus for obtaining optimal performance in a receiver |
May. 11, 2004 |
| 6671502 |
Control device for radio repeater in communication field |
Dec. 30, 2003 |
| 6653937 |
Wide area multipurpose tracking system |
Nov. 25, 2003 |
| 6628932 |
Radio receiver automatic gain control techniques |
Sep. 30, 2003 |
| 6590619 |
Broadcast sound signal processing circuit |
Jul. 8, 2003 |
| 6549763 |
Receiving apparatus and method |
Apr. 15, 2003 |
| 6498926 |
Programmable linear receiver having a variable IIP3 point |
Dec. 24, 2002 |
| 6480708 |
Variable attenuator, composite variable attenuator and mobile communication apparatus |
Nov. 12, 2002 |
| 6445732 |
Dynamic range reduction circuitry for a digital communications receiver |
Sep. 3, 2002 |
| 6389272 |
Receiver with auto gain control circuit of RF signal |
May. 14, 2002 |
| 6333690 |
Wide area multipurpose tracking system |
Dec. 25, 2001 |
| 6307599 |
Analog-digital broadcast shared receiving tuner |
Oct. 23, 2001 |
| 6297709 |
Temperature compensated variable attenuator |
Oct. 2, 2001 |
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