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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5483600 |
Wave dependent compressor |
Jan. 9, 1996 |
| 5471651 |
Method and system for compressing the dynamic range of audio signals |
Nov. 28, 1995 |
| 5463695 |
Peak accelerated compressor |
Oct. 31, 1995 |
| 5451949 |
One-bit analog-to-digital converters and digital-to-analog converters using an adaptive filter having two regimes of operation |
Sep. 19, 1995 |
| 5444788 |
Audio compressor combining feedback and feedfoward sidechain processing |
Aug. 22, 1995 |
| 5396562 |
Signal processing circuit for audio apparatus |
Mar. 7, 1995 |
| 5375255 |
Radio receiver comprising analog dynamic compression and digital expansion |
Dec. 20, 1994 |
| 5303308 |
Audio frequency signal compressing system |
Apr. 12, 1994 |
| 5298811 |
Synchronous logarithmic amplifier |
Mar. 29, 1994 |
| 5293139 |
CMOS-compander |
Mar. 8, 1994 |
| 5278912 |
Multiband programmable compression system |
Jan. 11, 1994 |
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