HK42997A - Idle channel tone and periodic noise suppression for sigma delta modulators using high level dither - Google Patents

Idle channel tone and periodic noise suppression for sigma delta modulators using high level dither Download PDF

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Publication number
HK42997A
HK42997A HK42997A HK42997A HK42997A HK 42997 A HK42997 A HK 42997A HK 42997 A HK42997 A HK 42997A HK 42997 A HK42997 A HK 42997A HK 42997 A HK42997 A HK 42997A
Authority
HK
Hong Kong
Prior art keywords
modulator
dither
signal
quantizer
noise
Prior art date
Application number
HK42997A
Other languages
German (de)
English (en)
French (fr)
Inventor
Robert Norsworthy Steven
Original Assignee
At&T Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by At&T Corp. filed Critical At&T Corp.
Publication of HK42997A publication Critical patent/HK42997A/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M3/324—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement
    • H03M3/326—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement by averaging out the errors
    • H03M3/328—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement by averaging out the errors using dither
    • H03M3/33—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement by averaging out the errors using dither the dither being a random signal
    • H03M3/332—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement by averaging out the errors using dither the dither being a random signal in particular a pseudo-random signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/458—Analogue/digital converters using delta-sigma modulation as an intermediate step

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)
HK42997A 1991-05-21 1997-04-03 Idle channel tone and periodic noise suppression for sigma delta modulators using high level dither HK42997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/703,527 US5144308A (en) 1991-05-21 1991-05-21 Idle channel tone and periodic noise suppression for sigma-delta modulators using high-level dither

Publications (1)

Publication Number Publication Date
HK42997A true HK42997A (en) 1997-04-11

Family

ID=24825739

Family Applications (1)

Application Number Title Priority Date Filing Date
HK42997A HK42997A (en) 1991-05-21 1997-04-03 Idle channel tone and periodic noise suppression for sigma delta modulators using high level dither

Country Status (6)

Country Link
US (1) US5144308A (cs)
EP (2) EP0709969B1 (cs)
JP (1) JPH0793582B2 (cs)
KR (1) KR950010212B1 (cs)
DE (2) DE69215271T2 (cs)
HK (1) HK42997A (cs)

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Also Published As

Publication number Publication date
EP0709969A2 (en) 1996-05-01
EP0515154B1 (en) 1996-11-20
EP0709969B1 (en) 2000-08-02
DE69231317T2 (de) 2000-12-28
JPH0793582B2 (ja) 1995-10-09
EP0709969A3 (cs) 1996-05-08
KR950010212B1 (ko) 1995-09-11
DE69231317D1 (de) 2000-09-07
EP0515154A1 (en) 1992-11-25
JPH05160736A (ja) 1993-06-25
US5144308A (en) 1992-09-01
KR920022692A (ko) 1992-12-19
DE69215271T2 (de) 1997-06-05
DE69215271D1 (de) 1997-01-02

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