FR2363235A1 - Procede et appareil de conversion numerique-analogique - Google Patents

Procede et appareil de conversion numerique-analogique

Info

Publication number
FR2363235A1
FR2363235A1 FR7720046A FR7720046A FR2363235A1 FR 2363235 A1 FR2363235 A1 FR 2363235A1 FR 7720046 A FR7720046 A FR 7720046A FR 7720046 A FR7720046 A FR 7720046A FR 2363235 A1 FR2363235 A1 FR 2363235A1
Authority
FR
France
Prior art keywords
digital
processed according
conversion method
analogue conversion
pulse width
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.)
Granted
Application number
FR7720046A
Other languages
English (en)
Other versions
FR2363235B1 (fr
Inventor
William G Crouse
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2363235A1 publication Critical patent/FR2363235A1/fr
Application granted granted Critical
Publication of FR2363235B1 publication Critical patent/FR2363235B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/661—Improving the reconstruction of the analogue output signal beyond the resolution of the digital input signal, e.g. by interpolation, by curve-fitting, by smoothing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/86—Digital/analogue converters with intermediate conversion to frequency of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

Les bits d'ordre inférieur du signal d'entrée sont traités selon un procédé de modulation de fréquence d'impulsion classique. Les bits d'ordre supérieur sont traités selon une variante de modulation de largeur d'impulsion dans laquelle la largeur d'impulsion requise pour générer le niveau analogique correspondant est divisée en un nombre fixe de tranches durant un temps d'échantillonnage donné, chaque tranche ayant une largeur variable en fonction à la fois des valeurs des bits d'ordre supérieur et inférieur. Application aux convertisseurs numérique-analogique
FR7720046A 1976-08-30 1977-06-21 Procede et appareil de conversion numerique-analogique Granted FR2363235A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/718,728 US4095218A (en) 1976-08-30 1976-08-30 Hybrid pulse width-pulse rate digital-to-analog converter method and apparatus

Publications (2)

Publication Number Publication Date
FR2363235A1 true FR2363235A1 (fr) 1978-03-24
FR2363235B1 FR2363235B1 (fr) 1982-04-09

Family

ID=24887257

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7720046A Granted FR2363235A1 (fr) 1976-08-30 1977-06-21 Procede et appareil de conversion numerique-analogique

Country Status (5)

Country Link
US (1) US4095218A (fr)
JP (1) JPS5329646A (fr)
DE (1) DE2732264A1 (fr)
FR (1) FR2363235A1 (fr)
GB (1) GB1565104A (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS547263A (en) * 1977-06-20 1979-01-19 Hitachi Ltd D-a converter
US4364026A (en) * 1979-11-30 1982-12-14 Rca Corporation Digital-to-analog converter useful in a television receiver
JPS58121827A (ja) * 1982-01-14 1983-07-20 Nec Corp パルス発生回路
JPS5955623A (ja) * 1982-09-24 1984-03-30 Sharp Corp デイジタル／アナログ変換方式
US4573069A (en) * 1984-03-29 1986-02-25 Rca Corporation Chrominance fine gain control in a digital television receiver
DE3425671A1 (de) * 1984-07-12 1986-01-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und vorrichtung zum messen der daempfung an lichtwellenleitern
US4940979A (en) * 1988-04-26 1990-07-10 Hewlett-Packard Company Combined rate/width modulation arrangement
GB9318238D0 (en) * 1993-09-02 1993-10-20 B & W Loudspeakers Digital converter
GB2330707B (en) * 1997-10-23 2001-10-24 Nokia Mobile Phones Ltd Digital to analogue converter
JP3090200B2 (ja) * 1997-11-14 2000-09-18 日本電気株式会社 パルス幅変調器
US6191722B1 (en) 1999-01-14 2001-02-20 Setra Systems, Inc. Pulse width modulation digital to analog converter
JP4073676B2 (ja) * 2001-03-21 2008-04-09 株式会社リコー Ｄａ変換器及びｄａ変換方法
DE102004011723A1 (de) * 2004-03-10 2005-09-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Digital-Analog-Wandler mit verschachteltem pulsweitenmodulierten Signal
US7855669B2 (en) 2008-09-26 2010-12-21 Silicon Laboratories, Inc. Circuit device to generate a high precision control signal
US8344795B2 (en) 2011-01-20 2013-01-01 International Business Machines Corporation Self-calibrated, broadband, tunable, active filter with unity gain cells for multi-standard and/or multiband channel selection
US8350738B2 (en) 2011-01-20 2013-01-08 International Business Machines Corporation Track and hold amplifiers and digital calibration for analog-to-digital converters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603977A (en) * 1969-06-19 1971-09-07 Westinghouse Electric Corp Digital-to-analog converter utilizing pulse duration modulation
BE791410A (fr) * 1971-11-19 1973-05-14 Westinghouse Electric Corp Appareil et methode de conversion d'une information numerique en une information analogique
US3942171A (en) * 1974-04-03 1976-03-02 Texas Instruments Incorporated Scanning system for digital-analog converter

Also Published As

Publication number Publication date
US4095218A (en) 1978-06-13
GB1565104A (en) 1980-04-16
JPS5329646A (en) 1978-03-20
DE2732264A1 (de) 1978-03-02
FR2363235B1 (fr) 1982-04-09

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Legal Events

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