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Class Information
Number: 375/252
Name: Pulse or digital communications > Pulse code modulation > Differential > Single bit (delta) > Plural feedback loops
Description: Subject matter having more than one signal path which feeds part of an output signal back to its input.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7522669 |
Method and apparatus for selective disregard of co-channel transmissions on a medium |
Apr. 21, 2009 |
| 7499674 |
Method and system for repeat request in hybrid ultra wideband-bluetooth radio |
Mar. 3, 2009 |
| 7450648 |
Digital signal processing device, a method and a delta-sigma modulator using the same method |
Nov. 11, 2008 |
| 7426371 |
Method and system for repeat request in hybrid ultra wideband-bluetooth radio |
Sep. 16, 2008 |
| 7398058 |
Method and system for repeat request in hybrid ultra wideband-bluetooth radio |
Jul. 8, 2008 |
| 7242718 |
Coding standard selecting method and terminal device |
Jul. 10, 2007 |
| 6798851 |
Decoding for a non-linear codec |
Sep. 28, 2004 |
| 6611221 |
Multi-bit sigma-delta modulator employing dynamic element matching using adaptively randomized data-weighted averaging |
Aug. 26, 2003 |
| 6486810 |
Method and apparatus for continuously variable slope delta modulation coding of signals |
Nov. 26, 2002 |
| 6393062 |
Methods and circuits for generating a preemphasis waveform |
May. 21, 2002 |
| 6384753 |
High density analog interface |
May. 7, 2002 |
| 6304608 |
Multibit sigma-delta converters employing dynamic element matching with reduced baseband tones |
Oct. 16, 2001 |
| 5815530 |
Data converters for sound equipment |
Sep. 29, 1998 |
| 5469475 |
Transmitter comprising an eletronic arrangement for generating a modulated carrier signal |
Nov. 21, 1995 |
| 5412430 |
Image coding method and image coding apparatus |
May. 2, 1995 |
| 5323188 |
DPCM predictive encoder |
Jun. 21, 1994 |
| 5030954 |
Double rate oversampled interpolative modulators for analog-to-digital conversion |
Jul. 9, 1991 |
| 5027120 |
Delta-sigma converter with bandpass filter for noise reduction in receivers |
Jun. 25, 1991 |
| 4940977 |
Adaptive-filter single-bit digital encoder and decoder and adaptation control circuit responsive to bit-stream loading |
Jul. 10, 1990 |
| 4937577 |
Integrated analog-to-digital converter |
Jun. 26, 1990 |
| 4862169 |
Oversampled A/D converter using filtered, cascaded noise shaping modulators |
Aug. 29, 1989 |
| 4860315 |
ADPCM encoding and decoding circuits |
Aug. 22, 1989 |
| 4833535 |
Image transmission apparatus |
May. 23, 1989 |
| 4831636 |
Coding transmission equipment for carrying out coding with adaptive quantization |
May. 16, 1989 |
| 4819253 |
Method for determining PCM coding law |
Apr. 4, 1989 |
| 4796004 |
Integrated analog-to-digital converter |
Jan. 3, 1989 |
| 4772871 |
Delta sigma modulator circuit for an analog-to-digital converter |
Sep. 20, 1988 |
| 4736188 |
Analog to digital converters |
Apr. 5, 1988 |
| 4631733 |
Transceiver |
Dec. 23, 1986 |
| 4612654 |
Digital encoding circuitry |
Sep. 16, 1986 |
| 4607281 |
Method and circuit arrangement for the improvement of the picture quality by activity-controlled DPCM coding |
Aug. 19, 1986 |
| 4588981 |
Double integration, delta-sigma, analog-digital coder |
May. 13, 1986 |
| 4542516 |
ADPCM Encoder/decoder with zero code suppression |
Sep. 17, 1985 |
| 4541104 |
Framing circuit for digital system |
Sep. 10, 1985 |
| 4517596 |
System comprising a preliminary processing device controlled in accordance with an amount of information stored in a buffer |
May. 14, 1985 |
| 4514852 |
Process for protected transmission of digital signals |
Apr. 30, 1985 |
| 4411003 |
Multiple-loop adaptive delta modulator |
Oct. 18, 1983 |
| 4369463 |
Gray scale image data compression with code words a function of image history |
Jan. 18, 1983 |
| 4109203 |
Delta-modulation encoder |
Aug. 22, 1978 |
| 4100494 |
Dynamic control of code modulated pulse transmission |
Jul. 11, 1978 |
| 4099122 |
Transmission system by means of time quantization and trivalent amplitude quantization |
Jul. 4, 1978 |
| 4075655 |
Composite feedback predictive code communication system for a color TV signal including a carrier chrominance signal |
Feb. 21, 1978 |
| 4025852 |
Method and arrangement for controlling delta modulator idle-channel noise |
May. 24, 1977 |
| 3995218 |
Adaptive delta modulation system for correcting mistracking |
Nov. 30, 1976 |
| 3956700 |
Two-feedback-path delta modulation system with circuits for reducing pulse width modulation |
May. 11, 1976 |
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