GB2232023B - Analogue to digital converter - Google Patents

Analogue to digital converter

Info

Publication number
GB2232023B
GB2232023B GB9009197A GB9009197A GB2232023B GB 2232023 B GB2232023 B GB 2232023B GB 9009197 A GB9009197 A GB 9009197A GB 9009197 A GB9009197 A GB 9009197A GB 2232023 B GB2232023 B GB 2232023B
Authority
GB
United Kingdom
Prior art keywords
pulses
feedback
controlling
analogue
digital converter
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
GB9009197A
Other versions
GB2232023A (en
GB9009197D0 (en
Inventor
Andrew Mark Thurston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
Marconi Co Ltd
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 GEC Marconi Ltd, Marconi Co Ltd filed Critical GEC Marconi Ltd
Priority to EP19900305436 priority Critical patent/EP0399738A3/en
Priority to AU55896/90A priority patent/AU624298B2/en
Priority to JP2136906A priority patent/JPH0396019A/en
Priority to US07/528,977 priority patent/US5027120A/en
Publication of GB9009197D0 publication Critical patent/GB9009197D0/en
Publication of GB2232023A publication Critical patent/GB2232023A/en
Application granted granted Critical
Publication of GB2232023B publication Critical patent/GB2232023B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/402—Arrangements specific to bandpass modulators
    • H03M3/404—Arrangements specific to bandpass modulators characterised by the type of bandpass filters used
    • H03M3/408—Arrangements specific to bandpass modulators characterised by the type of bandpass filters used by the use of an LC circuit
    • 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
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/412—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M3/422—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M3/43—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one
    • 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
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/436—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type
    • H03M3/438—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a higher order loop filter in the feedforward path
    • H03M3/454—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a higher order loop filter in the feedforward path with distributed feedback, i.e. with feedback paths from the quantiser output to more than one filter stage

Abstract

Analogue signals at i/p are converted to digital data at o/p by means of a Sigma-Delta modulator comprising a pair of bandpass filters H1(s), H2(s) and a feedback loop including DAC 22. The tendency of such a circuit to instability is reduced or eliminated by making small variations in the phase of the block 1 controlling the feedback pulses relative to the clock 2 controlling the data output pulses. As an alternative, corrections may be made to the feedback pulses by an additional feedback loop providing pulses for correcting the feedback pulses. <IMAGE>
GB9009197A 1989-05-26 1990-04-24 Analogue to digital converter Expired - Fee Related GB2232023B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19900305436 EP0399738A3 (en) 1989-05-26 1990-05-18 Analogue to digital converter
AU55896/90A AU624298B2 (en) 1989-05-26 1990-05-24 Delta-sigma converter with bandpass filter for noise reduction in receivers
JP2136906A JPH0396019A (en) 1989-05-26 1990-05-25 Analog/digital converter
US07/528,977 US5027120A (en) 1989-05-26 1990-05-25 Delta-sigma converter with bandpass filter for noise reduction in receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8912137A GB2232022A (en) 1989-05-26 1989-05-26 Analogue-to-digital converter

Publications (3)

Publication Number Publication Date
GB9009197D0 GB9009197D0 (en) 1990-06-20
GB2232023A GB2232023A (en) 1990-11-28
GB2232023B true GB2232023B (en) 1993-04-28

Family

ID=10657400

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8912137A Withdrawn GB2232022A (en) 1989-05-26 1989-05-26 Analogue-to-digital converter
GB9009197A Expired - Fee Related GB2232023B (en) 1989-05-26 1990-04-24 Analogue to digital converter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8912137A Withdrawn GB2232022A (en) 1989-05-26 1989-05-26 Analogue-to-digital converter

Country Status (1)

Country Link
GB (2) GB2232022A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256331B (en) * 1991-06-01 1994-08-03 Marconi Gec Ltd Analogue-to-digital converters
GB9111821D0 (en) * 1991-06-01 1991-07-24 Marconi Gec Ltd Analogue-to-digital converters
GB9124591D0 (en) * 1991-11-20 1992-01-08 Marconi Gec Ltd Analogue-to-digital converter
GB2271896B (en) * 1992-10-23 1995-08-23 Marconi Gec Ltd Analogue-to-digital converters
GB2281828B (en) * 1993-09-14 1997-08-06 Marconi Gec Ltd Analogue-to-digital converters and digital modulators
JP2837105B2 (en) * 1994-01-05 1998-12-14 三星電子株式会社 Receiver with sigma-delta analog-to-digital conversion for digital signals embedded in television signals
US6160506A (en) * 1998-06-12 2000-12-12 Lockheed Martin Corp. Low-noise sigma-delta analog-to-digital converter
FR2873517B1 (en) * 2004-07-20 2006-11-17 Eads Telecom Soc Par Actions S METHOD AND DEVICE FOR DIGITAL ANALOGUE CONVERSION WITH SYMMETRIC CORRECTION

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188517B (en) * 1986-03-27 1989-11-22 Multitone Electronics Plc Spread-spectrum receivers

Also Published As

Publication number Publication date
GB2232022A (en) 1990-11-28
GB2232023A (en) 1990-11-28
GB9009197D0 (en) 1990-06-20
GB8912137D0 (en) 1990-04-25

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010424