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Class Information
Number: 455/308
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Noise or interference elimination > With amplitude limiter
Description: Subject matter wherein the noise or interference reduction means includes diode or other amplitude limiting means.

Sub-classes under this class:

Class Number Class Name Patents
455/309 In demodulator or low frequency (audio amplifier circuit) 50

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8559551 Filter device stopping input of zero-valued sample Oct. 15, 2013
8548413 Noise suppression apparatus Oct. 1, 2013
8442471 Broadband tuner for very wide signal conversion May. 14, 2013
8432219 Amplitude control system and method for communication systems Apr. 30, 2013
8422978 Broadband tuner for very wide signal conversion Apr. 16, 2013
8150338 Method and apparatus for signal peak-to-average ratio reduction Apr. 3, 2012
8107918 Broadband tuner for very wide signal conversion Jan. 31, 2012
8005452 Digital comb limiter combiner Aug. 23, 2011
7995975 Method and apparatus for signal peak-to-average ratio reduction Aug. 9, 2011
7574189 Transmitter and power amplifying method Aug. 11, 2009
7483685 Method and device for wavelet denoising Jan. 27, 2009
7388962 Directional hearing enhancement systems Jun. 17, 2008
7151918 Low reflection limiter and transmitting/receiving module utilizing same Dec. 19, 2006
7092461 Polyphase receivers Aug. 15, 2006
7010283 Signal waveform detection circuit Mar. 7, 2006
6922555 Phase interpolation receiver for angle modulated RF signals Jul. 26, 2005
6826392 Multipath noise reduction method, multipath noise reducer, and FM receiver Nov. 30, 2004
6771701 Adaptive filter divergence control in echo cancelers by means of amplitude distribution evaluation with configurable hysteresis Aug. 3, 2004
6615022 Impulse noise rejection circuit and satellite communications terminal using the same Sep. 2, 2003
6405026 Communication device and method Jun. 11, 2002
6366627 Compressive receiver with frequency expansion Apr. 2, 2002
6339701 Method and apparatus for extending the dynamic range of a frequency mixer Jan. 15, 2002
6239730 Method and device for maximizing the ratio between signal and quantization noise when converting between analogue and digital form of a multi-carrier signal May. 29, 2001
6112065 Low to higher if conversion for active filtered limited IF systems Aug. 29, 2000
6055416 Prevention of audible control signal transmission Apr. 25, 2000
5937017 Complex signal limiting Aug. 10, 1999
5930695 Radio receiver with amplitude limiter prior to mixer and band limiting filter Jul. 27, 1999
5926750 Receiver Jul. 20, 1999
5903818 Radio paging system for improving message receive ratio by reducing intermodulation noise May. 11, 1999
5875390 Programmable intermediate frequency RSSI system including an adjustable rectifying stage Feb. 23, 1999
5809085 Apparatus and method for detecting and discriminating various signal types in the presence of impulse distortions Sep. 15, 1998
5805979 Control apparatus and control method for attenuating radio signal Sep. 8, 1998
5794136 Noise blanker and a radio receiver and method employing same Aug. 11, 1998
5778310 Co-channel interference reduction Jul. 7, 1998
5742900 Voltage-variable biased inverting limiter for RFI suppression overview Apr. 21, 1998
5740207 Complex signal limiting Apr. 14, 1998
5734975 Direct-coupled signaling receiver with PL/DPL detector Mar. 31, 1998
5703910 Digital radio receiver Dec. 30, 1997
5678218 Circuit for removing random FM noise Oct. 14, 1997
5606735 Slope equalizer using baseband detection Feb. 25, 1997
5596299 IF amplifier/limiter with positive feedback Jan. 21, 1997
5564095 RFI suppression by cascading nonlinear devices Oct. 8, 1996
5519890 Method of selectively reducing spectral components in a wideband radio frequency signal May. 21, 1996
5507022 Electric field level detecting apparatus Apr. 9, 1996
5451852 Control system having signal tracking window filters Sep. 19, 1995
5404589 FM receiver with dynamic intermediate frequency (IF) filter tuning Apr. 4, 1995
5396655 Adaptive canceler for contiguous band filtering Mar. 7, 1995
5375255 Radio receiver comprising analog dynamic compression and digital expansion Dec. 20, 1994
5321847 Apparatus and method for detecting intermodulation distortion in a radio frequency receiver Jun. 14, 1994
5212829 Circuit arrangement for suppression of interference signals May. 18, 1993

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