ES8106386A1 - Un control de ganancia para circuitos de linea telefonica digitales - Google Patents

Un control de ganancia para circuitos de linea telefonica digitales

Info

Publication number
ES8106386A1
ES8106386A1 ES497281A ES497281A ES8106386A1 ES 8106386 A1 ES8106386 A1 ES 8106386A1 ES 497281 A ES497281 A ES 497281A ES 497281 A ES497281 A ES 497281A ES 8106386 A1 ES8106386 A1 ES 8106386A1
Authority
ES
Spain
Prior art keywords
bits
signal
digital
gain control
gain
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
ES497281A
Other languages
English (en)
Other versions
ES497281A0 (es
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8106386A1 publication Critical patent/ES8106386A1/es
Publication of ES497281A0 publication Critical patent/ES497281A0/es
Granted 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; CALCULATING OR 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; CALCULATING OR 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)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

CIRCUITO DE CONTROL DE GANANCIA PARA CONSEGUIR EL NIVEL SONORO ADECUADO EN LINEAS DE TRANSMISION DIGITALES. EN EL CIRCUITO DE TRANMISION DE ABONADO SE INCORPORA UN CIRCUITO DE CONTROL AL QUE LE LLEGAN PALABRAS DIGITALES (XN) DE N BITS, LAS CUALES SON TRATADAS EN UN MULTIPLICADOR DIGITAL (61) CON PALABRAS DE M BITS Y CON COEFICIENTE ALFA, OBTENIENDOSE PALABRAS DE N + M BITS QUE LLEGAN A UN SUMADOR (62), DONDE SE TRATAN CON UNA SEÑAL DE ERROR DE M BITS PROCEDENTE DE LOS BITS MENOS SIGNIFICATIVOS DE LA PALABRA DIGITAL DE SALIDA ZN, OBTENIDA POR TRATAMIENTO EN EL CIRCUITO REDUCTOR (63) DE LA PALABRA DE N + M BITS QUE SE OBTIENE EN EL SUMADOR (62). LAS PALABRAS DE SALIDA ZN SE CORRESPONDEN CON LAS PALABRAS DE ENTRADA XN, AMPLIFICADAS POR EL COEFICIENTE ALFA.
ES497281A 1979-11-28 1980-11-28 Un control de ganancia para circuitos de linea telefonica digitales Granted ES497281A0 (es)

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
ES8106386A1 true ES8106386A1 (es) 1981-08-16
ES497281A0 ES497281A0 (es) 1981-08-16

Family

ID=22267178

Family Applications (1)

Application Number Title Priority Date Filing Date
ES497281A Granted ES497281A0 (es) 1979-11-28 1980-11-28 Un control de ganancia para circuitos de linea telefonica digitales

Country Status (12)

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

Families Citing this family (12)

* 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

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
GB2064242B (en) 1983-11-09
GB2064242A (en) 1981-06-10
DE3044582A1 (de) 1981-08-27
CA1158790A (en) 1983-12-13
SE8008240L (sv) 1981-05-29
IT8026299A0 (it) 1980-11-28
AU538239B2 (en) 1984-08-02
ES497281A0 (es) 1981-08-16
BE886388A (nl) 1981-06-01
NL8006260A (nl) 1981-07-01
IT1193564B (it) 1988-07-08
FR2471093A1 (fr) 1981-06-12
FR2471093B1 (fr) 1987-09-18
DE3044582C2 (de) 1986-10-23
JPS5690636A (en) 1981-07-22
JPS5942502B2 (ja) 1984-10-15
US4272648A (en) 1981-06-09
SE448928B (sv) 1987-03-23
AU6462680A (en) 1981-06-04

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