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Class Information
Number: 455/309
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Noise or interference elimination > With amplitude limiter > In demodulator or low frequency (audio amplifier circuit)
Description: Subject matter wherein the diode or other amplitude limiting means is a part of or associated with the demodulator or audio frequency circuits of the receiver.

Patents under this class:

Patent Number Title Of Patent Date Issued
8704654 Circuit for communication over DC power line using high temperature electronics Apr. 22, 2014
8624979 Monitoring apparatus for television Jan. 7, 2014
8554165 Universal demodulation and modulation for data communication in wireless power transfer Oct. 8, 2013
8422974 Noise cancellation for antenna module Apr. 16, 2013
8358994 Mitigating radio receiver multipath noise Jan. 22, 2013
8301103 Receiver with improved flicker noise performance Oct. 30, 2012
8290463 Universal demodulation and modulation for data communication in wireless power transfer Oct. 16, 2012
8218687 Frequency dependent I/Q imbalance estimation Jul. 10, 2012
8000958 Device and method for improving communication through dichotic input of a speech signal Aug. 16, 2011
7983648 Low intermediate frequency receiver and the same method thereof Jul. 19, 2011
7853298 Radio terminal unit, radio communication system and communication control method Dec. 14, 2010
7747238 Wireless communication device and data interface Jun. 29, 2010
7680456 Methods and apparatus to perform signal removal in a low intermediate frequency receiver Mar. 16, 2010
7650131 Wireless receiver and its demodulating method Jan. 19, 2010
7570933 Automatic volume control for amplitude modulated signals Aug. 4, 2009
7558549 Method and system for rejecting single-sided leakage into an amplitude modulated (AM) channel Jul. 7, 2009
7477885 DC offset cancellation circuits and methods Jan. 13, 2009
7346326 Mobile communication terminal with equalizer function Mar. 18, 2008
7330523 Estimating frequency offset Feb. 12, 2008
7277690 Communication apparatus including a mechanism for preventing demodulation of text telephone information during poor signal reception Oct. 2, 2007
7164897 Method and apparatus for conversion of radio frequency (RF) signals using aperiodic mixing signals Jan. 16, 2007
7158586 Systems and methods to provide wideband magnitude and phase imbalance calibration and compensation in quadrature receivers Jan. 2, 2007
7142836 Microwave filter distributed on circuit board of wireless communication product Nov. 28, 2006
7016661 Multi-mode receiver for frequency error mitigation Mar. 21, 2006
6937871 Anti-demodulator circuit, filtering device and demodulator circuit Aug. 30, 2005
6882861 Wireless user terminal and system having signal clipping circuit for switched capacitor sigma delta analog to digital converters Apr. 19, 2005
6826392 Multipath noise reduction method, multipath noise reducer, and FM receiver Nov. 30, 2004
6754480 Baseband analog circuit with improved noise characteristics Jun. 22, 2004
6636731 Demodulation method preserving a high spectral purity Oct. 21, 2003
6006082 FM demodulating device using an extended kalman filter Dec. 21, 1999
5881364 Radio pager having correcting circuit responsive to temperature variation Mar. 9, 1999
5710996 Adaptive noise canceling system and FM radio communication receiver using said system Jan. 20, 1998
5680418 Removing low frequency interference in a digital FM receiver Oct. 21, 1997
5564091 Method and apparatus for operating an automatic frequency control in a radio Oct. 8, 1996
5499399 Two-dimensional kernel adaptive interference suppression system Mar. 12, 1996
5438691 Receiver using a plurality of amplifiers and analog-to-digital converters for demodulating and decoding a signal Aug. 1, 1995
5051703 FM demodulator with tracking filter Sep. 24, 1991
5052050 Direct conversion FM receiver Sep. 24, 1991
4926499 Carrier phase controller for a receiver of phase modulated signals May. 15, 1990
4866261 Data limiter having current controlled response time Sep. 12, 1989
4814718 Microwave discriminator and demodulator/receiver using the same Mar. 21, 1989
4742570 Multipath noise detecting circuit May. 3, 1988
4622520 FM demodulator with impulse noise elimination circuit Nov. 11, 1986
4553102 Multilevel amplitude modulation demodulator with DC drift compensation Nov. 12, 1985
4479250 Dual audio capture limiter squelch circuit Oct. 23, 1984
4329714 Audio distortion eliminator May. 11, 1982
4271535 Noise eliminating system Jun. 2, 1981
4256975 Limiter circuit for removing nose from demodulated signals Mar. 17, 1981
4197505 Limiter circuit Apr. 8, 1980
4087641 Noise limiting circuit for FM stereo receiver May. 2, 1978

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