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Class Information
Number: 333/14
Name: Wave transmission lines and networks > Amplitude compression and expansion systems (i.e., companders)
Description: Networks including a non-linear device for decreasing the amplitude range of the signal applied to the device, and a nonlinear device connected to receive the wave having the decreased amplitude range for increasing or restoring the amplitude range of the signal, and long line transmission lines in combination with such networks.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8494182 Feedback limiter with adaptive time control Jul. 23, 2013
8351621 System and method for excursion limiting Jan. 8, 2013
8103301 Dynamic noise floors in a wireless device Jan. 24, 2012
8082157 Apparatus for encoding and decoding audio signal and method thereof Dec. 20, 2011
7961896 Expander circuit with reduced distortion Jun. 14, 2011
7944321 Harmonic suppressing circuit May. 17, 2011
7935835 Substituted cycloalkene derivative May. 3, 2011
7787634 Musical distortion circuits Aug. 31, 2010
7761060 Method and apparatus for transmission of signals Jul. 20, 2010
7715573 Audio bandwidth expansion May. 11, 2010
7667554 Pre-emphasis adjustment method Feb. 23, 2010
7558391 Compander architecture and methods Jul. 7, 2009
7003469 Audio signal processing apparatus and method thereof Feb. 21, 2006
6946850 Method and apparatus for filtering unwanted noise while amplifying a desired signal Sep. 20, 2005
6937912 Anti-aliased clipping by band-limited modulation with step functions Aug. 30, 2005
6807280 Audio signal processing circuit for reducing noise in an audio signal Oct. 19, 2004
6760452 Multi-channel audio signal limiter with shared clip detection Jul. 6, 2004
6720999 CCD imager analog processor systems and methods Apr. 13, 2004
6714093 Dynamics compressor for an analog signal to be compressed Mar. 30, 2004
6678382 Digital attenuator Jan. 13, 2004
6675125 Statistics generator system and method Jan. 6, 2004
6621367 Signal power dynamic range compressing circuit and power amplifier using the same Sep. 16, 2003
6597301 Apparatus and method for level-dependent companding for wireless audio noise reduction Jul. 22, 2003
6552591 Method and apparatus for processing a wide dynamic range signal Apr. 22, 2003
6542612 Companding amplifier with sidechannel gain control Apr. 1, 2003
6518852 Information signal compressor and expander Feb. 11, 2003
6297695 High volume expander circuit Oct. 2, 2001
6169808 Signal compressing circuit Jan. 2, 2001
6107879 Automatic dynamic range control circuit Aug. 22, 2000
6054895 Apparatus and method for pre-distortion correction of a power amplifier stage Apr. 25, 2000
6037838 Amplifier with programmable gain and input linearity usable in high-frequency lines Mar. 14, 2000
6023191 Method and apparatus for detecting an input signal Feb. 8, 2000
5923768 Digital audio processing Jul. 13, 1999
5892834 Audio level dynamic range compression Apr. 6, 1999
5822442 Gain compression amplfier providing a linear compression function Oct. 13, 1998
5793315 Bit-serial digital expandor Aug. 11, 1998
5781848 Mobile telephone device wherein a compressor circuit performs amplitude compression such that a less variable gain is given to an audio signal having a lower level range than an audio signal h Jul. 14, 1998
5737434 Multi-band audio compressor with look-ahead clipper Apr. 7, 1998
5731695 Voltage limiter circuit Mar. 24, 1998
5727075 Multipoint communication apparatus with reduced number of audio decoders Mar. 10, 1998
5706356 Audio processor Jan. 6, 1998
5633939 Compander circuit May. 27, 1997
5631648 Signal compression or expansion circuit for mobile communication May. 20, 1997
5631968 Signal conditioning circuit for compressing audio signals May. 20, 1997
5596646 Audio tape saturation simulator Jan. 21, 1997
5537477 Frequency characteristic shaping circuitry and method Jul. 16, 1996
5515446 Electronic audio accurate reproduction system and method May. 7, 1996
5495468 System and method for transmitting plural information waveforms over a single communications channel using lincompex techniques Feb. 27, 1996
5493699 Low noise communication analog compressor and analog expander Feb. 20, 1996
5485524 System for processing an audio signal so as to reduce the noise contained therein by monitoring the audio signal content within a plurality of frequency bands Jan. 16, 1996

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