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Class Information
Number: 341/77
Name: Coded data generation or conversion > Digital code to digital code converters > To or from differential codes > To or from delta modulation codes
Description: Subject matter where the output signal is a series of one bit words representing the difference between the current input signal and the integral value of all prior input signals.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8711980 Receiver with feedback continuous-time delta-sigma modulator with current-mode input Apr. 29, 2014
8633837 Encoding and decoding methods and devices employing dual codesets Jan. 21, 2014
8593311 Method and device for encoding and/or decoding a sequence of discrete source values and data carrier provided with an encoded sequence of source values Nov. 26, 2013
8482439 Adaptive differential pulse code modulation encoding apparatus and decoding apparatus Jul. 9, 2013
8451067 Variable modulus modulator for fractional-N frequency synthesizers May. 28, 2013
8446299 Method and device for encoding and decoding of data in unique number values May. 21, 2013
8278840 Sigma delta current source and LED driver Oct. 2, 2012
8164491 Coefficient multiplier and digital delta-sigma modulator using the same Apr. 24, 2012
7928867 Analog to digital converter with digital filter Apr. 19, 2011
7786914 Time-interleaved delta-sigma modulator Aug. 31, 2010
7777656 Decoding, encoding/decoding and converting Aug. 17, 2010
7672839 Detecting audio signal activity in a communications system Mar. 2, 2010
7639757 Pulse modulator and pulse modulation method Dec. 29, 2009
7592936 Input distribution determination for denoising Sep. 22, 2009
7576672 Adaptive Dynamic Range Control Aug. 18, 2009
7571076 Performance monitor device, data collecting method and program for the same Aug. 4, 2009
7532141 Pulse width modulation method and digital analogue converter using the same May. 12, 2009
7498961 Context identification using a denoised signal Mar. 3, 2009
7460046 Sigma-delta modulators Dec. 2, 2008
7439893 Delta sigma modulation D/A converting system Oct. 21, 2008
7420485 Sigma-delta modulator and method for sigma-delta modulation Sep. 2, 2008
7276978 Phase locked loop comprising a sigma-delta modulator Oct. 2, 2007
7266152 Digital signal processing device and digital signal processing method Sep. 4, 2007
7212137 Delta sigma modulator with integral decimation May. 1, 2007
7136420 Recording of super-audio or like one-bit-per-sample signals on a PCM recorder Nov. 14, 2006
7096180 Method and apparatuses for improving quality of digitally encoded speech in the presence of interference Aug. 22, 2006
7068196 Digital signal processing device and digital signal processing method Jun. 27, 2006
6995699 Encoding method, and encoding apparatus, and decoding method and decoding apparatus Feb. 7, 2006
6983011 Filter circuit Jan. 3, 2006
6943709 Self-adaptable data compression technique Sep. 13, 2005
6924756 Method and system for processing a digital signal Aug. 2, 2005
6813320 Wireless telecommunications multi-carrier receiver architecture Nov. 2, 2004
6756922 Method and system for compression of a set of mostly similar strings allowing fast retrieval Jun. 29, 2004
6727833 Adaptive .SIGMA..DELTA. modulation with one-bit quantization Apr. 27, 2004
6628720 Transmitting apparatus and reproducing apparatus Sep. 30, 2003
6587062 Flexible interface circuit and method for delta sigma A/D converters Jul. 1, 2003
6570512 Circuit configuration for quantization of digital signals and for filtering quantization noise May. 27, 2003
6535845 Processing an audio bitstream signal Mar. 18, 2003
6535153 Adaptive sigma-delta modulation with one-bit quantization Mar. 18, 2003
6480129 Methods and apparatus for correction of higher order delta sigma converters Nov. 12, 2002
6462690 Circuit systems and methods for multirate digital-to-analog amplifier systems Oct. 8, 2002
6407689 Method and apparatus for controlling stages of a multi-stage circuit Jun. 18, 2002
6404357 Digital/analogue communication system for increasing transfer efficiency of digital sample data Jun. 11, 2002
6388586 Method for reversing the bits of a computer data structure May. 14, 2002
6300890 Delta-sigma modulator and AD converter Oct. 9, 2001
6289306 Data processing of a bitstream signal Sep. 11, 2001
6285306 Circuits and methods for functional processing of delta modulated pulse density stream Sep. 4, 2001
6278394 Signal processing circuit and method of operation Aug. 21, 2001
6255975 Circuits and methods for noise filtering in 1-bit audio applications and systems using the same Jul. 3, 2001
6234658 Method and apparatus for producing signal processing circuits in the delta sigma domain May. 22, 2001

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