FR2471093B1 - Circuit et procede de commande de gain pour signal numerique du type utilise dans les systemes telephoniques a commutation numerique et joncteur de ligne equipe d'un tel circuit - Google Patents

Circuit et procede de commande de gain pour signal numerique du type utilise dans les systemes telephoniques a commutation numerique et joncteur de ligne equipe d'un tel circuit

Info

Publication number
FR2471093B1
FR2471093B1 FR8025242A FR8025242A FR2471093B1 FR 2471093 B1 FR2471093 B1 FR 2471093B1 FR 8025242 A FR8025242 A FR 8025242A FR 8025242 A FR8025242 A FR 8025242A FR 2471093 B1 FR2471093 B1 FR 2471093B1
Authority
FR
France
Prior art keywords
circuit
digital
trunker
line
gain control
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
Application number
FR8025242A
Other languages
English (en)
Other versions
FR2471093A1 (fr
Inventor
Bhagwati Prasad Agrawal
Kishan Shenoi
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 Standard Electric Corp
Original Assignee
International Standard Electric 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 Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2471093A1 publication Critical patent/FR2471093A1/fr
Application granted granted Critical
Publication of FR2471093B1 publication Critical patent/FR2471093B1/fr
Expired legal-status Critical Current

Links

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
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/3031—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path
    • H03M7/3042—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path the modulator being of the error feedback type, i.e. having loop filter stages in the feedback path only
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
    • G06F7/5443—Sum of products
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/002—Control of digital or coded signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/38—Indexing scheme relating to groups G06F7/38 - G06F7/575
    • G06F2207/48—Indexing scheme relating to groups G06F7/48 - G06F7/575
    • G06F2207/4802—Special implementations
    • G06F2207/4814—Non-logic devices, e.g. operational amplifiers
    • 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
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/302—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M7/3024—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M7/3026—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a multiple bit one

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Control Of Amplification And Gain Control (AREA)
FR8025242A 1979-11-28 1980-11-28 Circuit et procede de commande de gain pour signal numerique du type utilise dans les systemes telephoniques a commutation numerique et joncteur de ligne equipe d'un tel circuit Expired FR2471093B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/098,110 US4272648A (en) 1979-11-28 1979-11-28 Gain control apparatus for digital telephone line circuits

Publications (2)

Publication Number Publication Date
FR2471093A1 FR2471093A1 (fr) 1981-06-12
FR2471093B1 true FR2471093B1 (fr) 1987-09-18

Family

ID=22267178

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8025242A Expired FR2471093B1 (fr) 1979-11-28 1980-11-28 Circuit et procede de commande de gain pour signal numerique du type utilise dans les systemes telephoniques a commutation numerique et joncteur de ligne equipe d'un tel circuit

Country Status (12)

Country Link
US (1) US4272648A (fr)
JP (1) JPS5942502B2 (fr)
AU (1) AU538239B2 (fr)
BE (1) BE886388A (fr)
CA (1) CA1158790A (fr)
DE (1) DE3044582C2 (fr)
ES (1) ES497281A0 (fr)
FR (1) FR2471093B1 (fr)
GB (1) GB2064242B (fr)
IT (1) IT1193564B (fr)
NL (1) NL8006260A (fr)
SE (1) SE448928B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL190093C (nl) 1979-12-17 1993-10-18 Victor Company Of Japan Comprimeer- en expandeerstelsel.
US4447826A (en) * 1982-03-18 1984-05-08 Rca Corporation Digital television receiver automatic chroma control system
US4546342A (en) * 1983-12-14 1985-10-08 Digital Recording Research Limited Partnership Data compression method and apparatus
US5029162A (en) * 1990-03-06 1991-07-02 Confertech International Automatic gain control using root-mean-square circuitry in a digital domain conference bridge for a telephone network
US5259001A (en) * 1991-12-17 1993-11-02 Motorola, Inc. ADPCM decoder with an integral digital receive gain and method therefor
KR0139176B1 (ko) * 1992-06-30 1998-06-15 김광호 다해상도 선형왜곡 보상방법 및 그 장치
US5623513A (en) * 1993-12-13 1997-04-22 Amati Communications Corporation Mitigating clipping and quantization effects in digital transmission systems
JP4899271B2 (ja) * 2001-08-10 2012-03-21 富士通セミコンダクター株式会社 アナログ制御方法、アナログ制御装置、ａｇｃ、及びａｇｃの制御方法
US7043423B2 (en) * 2002-07-16 2006-05-09 Dolby Laboratories Licensing Corporation Low bit-rate audio coding systems and methods that use expanding quantizers with arithmetic coding
DE10247208A1 (de) * 2002-10-10 2004-04-22 Infineon Technologies Ag Brückenschaltung zur Echounterdrückung in Kommunikationseinrichtungen
JP3755602B2 (ja) * 2003-03-04 2006-03-15 ソニー株式会社 信号処理装置、信用処理装置用プログラム、信号処理装置用プログラムを記録した記録媒体、及び信号処理方法
US10570113B2 (en) 2010-04-09 2020-02-25 Semiconductor Energy Laboratory Co., Ltd. Aromatic amine derivative, light-emitting element, light-emitting device, electronic device, and lighting device
CN115951862A (zh) * 2022-12-27 2023-04-11 上海贝岭股份有限公司 Dither信号产生方法、电路及Sigma Delta调制器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594565A (en) * 1968-05-31 1971-07-20 Singer Co Round off apparatus for electronic calculators
US3997770A (en) * 1973-07-09 1976-12-14 U.S. Philips Corporation Recursive digital filter
NL169535C (nl) * 1974-11-14 1982-07-16 Philips Nv Digitale signaalbewerkingsinrichting met gestuurde kwantisering.
JPS5182548A (en) * 1974-12-27 1976-07-20 Fujitsu Ltd Jidotokaki
GB1584778A (en) * 1976-09-17 1981-02-18 Gen Electric Telecommunication exchanges
GB1596943A (en) * 1978-02-14 1981-09-03 Itt Ind Ltd Level control of digital signals

Also Published As

Publication number Publication date
ES8106386A1 (es) 1981-08-16
BE886388A (nl) 1981-06-01
JPS5690636A (en) 1981-07-22
GB2064242B (en) 1983-11-09
GB2064242A (en) 1981-06-10
JPS5942502B2 (ja) 1984-10-15
CA1158790A (fr) 1983-12-13
NL8006260A (nl) 1981-07-01
US4272648A (en) 1981-06-09
DE3044582A1 (de) 1981-08-27
IT8026299A0 (it) 1980-11-28
IT1193564B (it) 1988-07-08
FR2471093A1 (fr) 1981-06-12
AU6462680A (en) 1981-06-04
SE448928B (sv) 1987-03-23
ES497281A0 (es) 1981-08-16
SE8008240L (sv) 1981-05-29
DE3044582C2 (de) 1986-10-23
AU538239B2 (en) 1984-08-02

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse