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Class Information
Number: 455/312
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Noise or interference elimination > In demodulator or low frequency (e.g., audio frequency)
Description: Subject matter wherein the noise or interference reduction means forms an integral part of or is electrically associated with the circuitry of the demodulator or the low frequency (e.g., audio frequency) amplifier stages of the receiver.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8704654 Circuit for communication over DC power line using high temperature electronics Apr. 22, 2014
8693968 Very low intermediate frequency (VLIF) receiver Apr. 8, 2014
8682276 Broadcast communication or multicast communication-capable mobile station Mar. 25, 2014
8648611 RF sensing circuit with a voltage-controlled oscillator Feb. 11, 2014
8588724 Optimal narrowband interference removal for signals separated in time Nov. 19, 2013
8483644 Electronic component allowing the decoding of a radiofrequency transmission channel conveying coded digital information, in particular for satellite digital telebroadcasting Jul. 9, 2013
8457572 Audio comparison method and apparatus Jun. 4, 2013
8385488 Inter-cell interference mitigation method using spatial covariance matrix estimation method for inter-cell interference mitigation of MIMO antenna OFDM system Feb. 26, 2013
8358994 Mitigating radio receiver multipath noise Jan. 22, 2013
8301103 Receiver with improved flicker noise performance Oct. 30, 2012
8280314 Method and apparatus for compensating for transceiver impairments Oct. 2, 2012
8265679 Bundling of communication signals for efficiency Sep. 11, 2012
8249539 Device and method for DC offset cancellation Aug. 21, 2012
8099072 Frequency changer circuits Jan. 17, 2012
8073418 Receiving systems and methods for audio processing Dec. 6, 2011
8064866 Passive processing device for interfacing and for ESD and radio signal rejection in audio signal paths of an electronic device Nov. 22, 2011
8059571 Methodology for designing environment adaptive ultra low power wireless communication systems and methods Nov. 15, 2011
8036622 DC offset cancellation circuit for a receiver Oct. 11, 2011
8018273 Filter circuit Sep. 13, 2011
7932775 Digital demodulation device and related method Apr. 26, 2011
7885631 Method for receiving signal in communication system and system therefor Feb. 8, 2011
7885626 Mobile communication apparatus Feb. 8, 2011
7860460 Wireless signal loss detection Dec. 28, 2010
7856218 Direct conversion receiver Dec. 21, 2010
7835773 Systems and methods for adjustable audio operation in a mobile communication device Nov. 16, 2010
7801479 Method for receiving digital multimedia broadcasting in a weak electromagnetic field region and an apparatus therefor Sep. 21, 2010
7693242 DC offset correction for constant envelope signals Apr. 6, 2010
7684775 Method and apparatus for compensating DC level in an adaptive radio receiver Mar. 23, 2010
7676046 Method of removing noise and interference from signal Mar. 9, 2010
7664197 AM receiving circuit Feb. 16, 2010
7650125 System and method for SAP FM demodulation Jan. 19, 2010
7590400 Radio apparatus Sep. 15, 2009
7499692 Receiving circuit, and receiving apparatus and transmitting/receiving apparatus using the receiving circuit Mar. 3, 2009
7469137 Radio receiver DC offset cancellation via ADC input bias Dec. 23, 2008
7415260 Current-mode direct conversion receiver Aug. 19, 2008
7403760 DC offset correction for direct-conversion receiver Jul. 22, 2008
7366489 Mobile communication apparatus Apr. 29, 2008
7299026 Method and apparatus for interference cancellation performing level adjustment processing for standardizing a channel estimation value between operations of channel estimation processing and j Nov. 20, 2007
7295823 Combined discrete automatic gain control (AGC) and DC estimation Nov. 13, 2007
7260373 Direct conversion receiver Aug. 21, 2007
7254379 RF receiver mismatch calibration system and method Aug. 7, 2007
7221925 Broadcast receiver with antenna/frequency diversity May. 22, 2007
7212813 Telecommunication device with software components May. 1, 2007
7184738 Radio apparatus Feb. 27, 2007
7171180 AM receiver circuit performing sound quality compensation of AM detection output signal Jan. 30, 2007
7164898 Wireless portable device Jan. 16, 2007
7164897 Method and apparatus for conversion of radio frequency (RF) signals using aperiodic mixing signals Jan. 16, 2007
7139542 Method and apparatus for compensating DC level in an adaptive radio receiver Nov. 21, 2006
7099383 Apparatus and associated method for operating upon data signals received at a receiving station of a fixed wireless access communication system Aug. 29, 2006
7062243 Combined discrete automatic gain control (AGC) and DC estimation Jun. 13, 2006

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