FR2379943A1 - Perfectionnements aux convertisseurs fournissant un signal module par impulsions codees - Google Patents

Perfectionnements aux convertisseurs fournissant un signal module par impulsions codees

Info

Publication number
FR2379943A1
FR2379943A1 FR7803441A FR7803441A FR2379943A1 FR 2379943 A1 FR2379943 A1 FR 2379943A1 FR 7803441 A FR7803441 A FR 7803441A FR 7803441 A FR7803441 A FR 7803441A FR 2379943 A1 FR2379943 A1 FR 2379943A1
Authority
FR
France
Prior art keywords
counter
module signal
encoded pulses
bits
accumulator
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
FR7803441A
Other languages
English (en)
Other versions
FR2379943B1 (fr
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Publication of FR2379943A1 publication Critical patent/FR2379943A1/fr
Application granted granted Critical
Publication of FR2379943B1 publication Critical patent/FR2379943B1/fr
Granted 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
    • H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
    • H03M3/502—Details of the final digital/analogue conversion following the digital delta-sigma modulation

Abstract

Convertisseur de signal à modulation delta sigma en signal à modulation par impulsions codées. Le convertisseur comprend un compteur 10 à n bits, un élément 12 valeur vraie complément 0-1 à n-1 bits relié à la sortie du compteur et un accumulateur 15 à m bits relié à l'élément 12. L'élément 12 est commandé par le bit le plus significatif du compteur 10 et opère sur n-1 bits du compteur en fonction de l'entrée modulée en delta sigma de façon à fournir des échantillons de sortie affectés d'un poids. Ces derniers sont cumulés dans l'accumulateur et fournissent les échantillons modulés en PCM. Application à la téléphonie.
FR7803441A 1977-02-07 1978-02-07 Perfectionnements aux convertisseurs fournissant un signal module par impulsions codees Granted FR2379943A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5014/77A GB1588219A (en) 1977-02-07 1977-02-07 Conversion of analogue signals to digital signals

Publications (2)

Publication Number Publication Date
FR2379943A1 true FR2379943A1 (fr) 1978-09-01
FR2379943B1 FR2379943B1 (fr) 1983-07-01

Family

ID=9788126

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803441A Granted FR2379943A1 (fr) 1977-02-07 1978-02-07 Perfectionnements aux convertisseurs fournissant un signal module par impulsions codees

Country Status (8)

Country Link
US (1) US4243977A (fr)
JP (1) JPS53121451A (fr)
CA (1) CA1132264A (fr)
DE (1) DE2804915A1 (fr)
FR (1) FR2379943A1 (fr)
GB (1) GB1588219A (fr)
NL (1) NL186837C (fr)
SE (1) SE426200B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA786110B (en) * 1977-11-07 1979-10-31 Post Office Improvements in or relating to the switching of digital signals
WO1981003728A1 (fr) * 1980-06-18 1981-12-24 Advanced Micro Devices Inc Dispositif de circuit de traitement audio d'une ligne d'abonne
JPH0430832Y2 (fr) * 1986-12-19 1992-07-24
US4884037A (en) * 1987-07-28 1989-11-28 Yamaha Corporation FM demodulation circuit
JPH07105724B2 (ja) * 1989-07-14 1995-11-13 ヤマハ株式会社 ディジタル・アナログ変換回路
GB9711374D0 (en) * 1997-06-02 1997-07-30 H Vin Mats E Signal processing
JP2003059182A (ja) * 2001-08-10 2003-02-28 Teac Corp １ビット形式ディジタル信号の記録方法及び記録装置及び付加装置
US6606044B2 (en) 2002-01-02 2003-08-12 Motorola, Inc. Method and apparatus for generating a pulse width modulated signal
US6982662B2 (en) * 2003-03-06 2006-01-03 Texas Instruments Incorporated Method and apparatus for efficient conversion of signals using look-up table

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2276741A1 (fr) * 1974-06-24 1976-01-23 North Electric Co Ensemble de transmission de donnees par conversion de signaux a modulation delta lineaire en signaux condenses modulee par impulsions et codage, et vice-versa
US4032914A (en) * 1976-04-23 1977-06-28 Bell Telephone Laboratories, Incorporated Analog to digital converter with noise suppression

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716849A (en) * 1970-06-08 1973-02-13 Solarton Electronic Integrating measurements with noise reduction
US3707712A (en) * 1970-06-10 1972-12-26 Univ Sherbrooke Converter from delta modulation to pulse code modulation
JPS513468B1 (fr) * 1970-10-28 1976-02-03
US3820111A (en) * 1972-11-13 1974-06-25 Bell Telephone Labor Inc Analog-to-digital converter
US3815124A (en) * 1973-01-16 1974-06-04 Westinghouse Electric Corp Analog to digital converter
NL7400764A (nl) * 1974-01-21 1975-07-23 Philips Nv Digitale inrichting voor het omzetten van ge- comprimeerde delta gemoduleerde signalen in pcm-signalen.
US4035724A (en) * 1974-05-08 1977-07-12 Universite De Sherbrooke Digital converter from continuous variable slope delta modulation to pulse code modulation
US3949299A (en) * 1974-11-05 1976-04-06 North Electric Company Signal coding for telephone communication system
US3971891A (en) * 1975-03-14 1976-07-27 Martin Marietta Corporation Adaptable time division switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2276741A1 (fr) * 1974-06-24 1976-01-23 North Electric Co Ensemble de transmission de donnees par conversion de signaux a modulation delta lineaire en signaux condenses modulee par impulsions et codage, et vice-versa
US4032914A (en) * 1976-04-23 1977-06-28 Bell Telephone Laboratories, Incorporated Analog to digital converter with noise suppression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *

Also Published As

Publication number Publication date
SE426200B (sv) 1982-12-13
NL7801175A (nl) 1978-08-09
US4243977A (en) 1981-01-06
CA1132264A (fr) 1982-09-21
NL186837B (nl) 1990-10-01
DE2804915C2 (fr) 1989-06-01
JPS53121451A (en) 1978-10-23
FR2379943B1 (fr) 1983-07-01
NL186837C (nl) 1991-03-01
SE7801301L (sv) 1978-08-08
GB1588219A (en) 1981-04-15
DE2804915A1 (de) 1978-08-17
JPS6222289B2 (fr) 1987-05-18

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ST Notification of lapse