FR2450533A1 - Circuit de conversion de signaux a modulation par impulsions codees et de signaux a modulation d'impulsion en amplitude pour equipement de commutation telephonique numerique - Google Patents

Circuit de conversion de signaux a modulation par impulsions codees et de signaux a modulation d'impulsion en amplitude pour equipement de commutation telephonique numerique

Info

Publication number
FR2450533A1
FR2450533A1 FR8004189A FR8004189A FR2450533A1 FR 2450533 A1 FR2450533 A1 FR 2450533A1 FR 8004189 A FR8004189 A FR 8004189A FR 8004189 A FR8004189 A FR 8004189A FR 2450533 A1 FR2450533 A1 FR 2450533A1
Authority
FR
France
Prior art keywords
signals
pulse modulation
amplitude
circuit
switching equipment
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
FR8004189A
Other languages
English (en)
Other versions
FR2450533B1 (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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2450533A1 publication Critical patent/FR2450533A1/fr
Application granted granted Critical
Publication of FR2450533B1 publication Critical patent/FR2450533B1/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
    • H03M1/12—Analogue/digital converters
    • H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
    • H03M1/129—Means for adapting the input signal to the range the converter can handle, e.g. limiting, pre-scaling ; Out-of-range indication
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K11/00—Transforming types of modulations, e.g. position-modulated pulses into duration-modulated pulses
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

LE CIRCUIT DE CONVERSION 20 SELON LA PRESENTE INVENTION EST DESTINE A ETRE UTILISE DANS UN EQUIPEMENT DE COMMUTATION TELEPHONIQUE NUMERIQUE 10 DANS LE BUT DE TRANSFORMER DES SIGNAUX A MODULATION D'IMPULSION EN AMPLITUDE EN SIGNAUX A MODULATION PAR IMPULSIONS CODEES ET DES SIGNAUX A MODULATION PAR IMPULSIONS CODEES EN SIGNAUX A MODULATION D'IMPULSION EN AMPLITUDE. LORSQUE CES CONVERSIONS SONT EFFECTUEES, IL EST SOUHAITABLE DE REGLER L'AMPLITUDE DES SIGNAUX IMPLIQUES POUR TENIR COMPTE DES PERTES DIFFERENTES DANS LE CIRCUIT ANALOGIQUE ASSOCIE. LA PRESENTE INVENTION FAIT APPEL A DES CONVERTISSEURS NUMERIQUES DE CODE 25, 42 DANS LA PARTIE NUMERIQUE DES CIRCUITS DE CONVERSION QUI SONT COMMANDES PAR UN REGISTRE DE MEMORISATION 26, DANS LE BUT DE FAIRE VARIER LES NIVEAUX DES SIGNAUX.
FR8004189A 1979-02-27 1980-02-26 Circuit de conversion de signaux a modulation par impulsions codees et de signaux a modulation d'impulsion en amplitude pour equipement de commutation telephonique numerique Granted FR2450533A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000322373A CA1152650A (fr) 1979-02-27 1979-02-27 Circuit de conversion de signaux mia en signaux mic avec variation du niveau du signal dans la partie mic du circuit

Publications (2)

Publication Number Publication Date
FR2450533A1 true FR2450533A1 (fr) 1980-09-26
FR2450533B1 FR2450533B1 (fr) 1984-04-06

Family

ID=4113638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8004189A Granted FR2450533A1 (fr) 1979-02-27 1980-02-26 Circuit de conversion de signaux a modulation par impulsions codees et de signaux a modulation d'impulsion en amplitude pour equipement de commutation telephonique numerique

Country Status (8)

Country Link
JP (1) JPS55120295A (fr)
AT (1) AT390703B (fr)
CA (1) CA1152650A (fr)
DE (1) DE3007211A1 (fr)
ES (1) ES8104683A1 (fr)
FR (1) FR2450533A1 (fr)
GB (1) GB2050112B (fr)
SE (1) SE439713B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396938A (en) * 1981-07-23 1983-08-02 Rca Corporation Controlled ram signal processor
JPH0396189A (ja) * 1989-09-08 1991-04-22 Nitsuko Corp デジタル交換機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877028A (en) * 1974-02-22 1975-04-08 Gte Automatic Electric Lab Inc Pcm encoder-decoder apparatus
FR2273412A1 (fr) * 1974-05-27 1975-12-26 Telettra Lab Telefon
US3943466A (en) * 1973-07-12 1976-03-09 Societa Italiana Telecomunicazioni Siemens S.P.A. Compander for TDM telecommunication system
US3984829A (en) * 1973-06-29 1976-10-05 Siemens Aktiengesellschaft Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147408A (en) * 1977-05-27 1978-12-22 Fujitsu Ltd Gain control system with variable time slot
JPS549511A (en) * 1977-06-24 1979-01-24 Fujitsu Ltd Digital gain control system using read only memory

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984829A (en) * 1973-06-29 1976-10-05 Siemens Aktiengesellschaft Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals
US3943466A (en) * 1973-07-12 1976-03-09 Societa Italiana Telecomunicazioni Siemens S.P.A. Compander for TDM telecommunication system
US3877028A (en) * 1974-02-22 1975-04-08 Gte Automatic Electric Lab Inc Pcm encoder-decoder apparatus
FR2273412A1 (fr) * 1974-05-27 1975-12-26 Telettra Lab Telefon

Also Published As

Publication number Publication date
ES488946A0 (es) 1981-04-16
DE3007211A1 (de) 1980-09-04
SE8001498L (sv) 1980-08-28
GB2050112A (en) 1980-12-31
FR2450533B1 (fr) 1984-04-06
GB2050112B (en) 1983-05-25
CA1152650A (fr) 1983-08-23
JPS55120295A (en) 1980-09-16
AT390703B (de) 1990-06-25
ATA108180A (de) 1989-11-15
ES8104683A1 (es) 1981-04-16
SE439713B (sv) 1985-06-24

Similar Documents

Publication Publication Date Title
KR890017891A (ko) 델타-시그마 변조형 아날로그-디지탈 변환 회로
WO2004051856A3 (fr) Convertisseurs de donnees a etages de sortie de modulation d'impulsions en duree numeriquement filtres et procedes et systemes utilisant ceux-ci
ATE175062T1 (de) Ad-wandler mit moduliertem zittersignal
DE3883081D1 (de) Analog-digitalumsetzer mit delta-sigmamodulation.
CA2030794A1 (fr) Modulateur fm
DE69912384D1 (de) Elektronische Digital-Analog Wandleranordnung für eine Basisbandübertragungskette
HK1002340A1 (en) A frequency translating coherent analog to digital conversion system for modulated signals
WO2020117169A3 (fr) Procédé de commande de temps mort pour convertisseurs électroniques de puissance et circuit permettant l'application de ce procédé
FR2450533A1 (fr) Circuit de conversion de signaux a modulation par impulsions codees et de signaux a modulation d'impulsion en amplitude pour equipement de commutation telephonique numerique
AU4634589A (en) Digital to amplitude modulated analog converter
EP0231950A3 (fr) Méthode de conversion analogique-numérique non-linéaire
EP0271166A3 (fr) Agencement de circuit numérique de réduction du bruit de quantification
KR880003526A (ko) 영상신호의 전송방법
GB1512612A (en) Analogue to digital conversion
NO922267D0 (no) Fremgangsmaate og kretser for baandpass-signalbehandling
GB2171569B (en) Improvements in or relating to analogue to digital converters
JPS6458125A (en) Digital analog converter
ATE176968T1 (de) Schaltungsanordnung zur analog/digital-wandlung von frequenzmodulierten zwischenfrequenzsignalen
KR960007655B1 (en) Delta-sigma a/d
EP1511263A3 (fr) Procédé et dispositif pour modulation d'amplitude en quadrature à plusieurs niveaux
HK1093123A1 (en) Integrated circuit containing a delta-sigma modulator with two-step quantization
JPS6472620A (en) Pulse width modulation type d/a converter
JPS5513526A (en) Signal converter
SU633159A1 (ru) Модул тор телефонного канала
SU1511825A1 (ru) Дискретное фазосдвигающее устройство