CA1113609A - Code converters - Google Patents

Code converters

Info

Publication number
CA1113609A
CA1113609A CA291,422A CA291422A CA1113609A CA 1113609 A CA1113609 A CA 1113609A CA 291422 A CA291422 A CA 291422A CA 1113609 A CA1113609 A CA 1113609A
Authority
CA
Canada
Prior art keywords
signal
pcm
accumulator
pulse density
converting
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
CA291,422A
Other languages
English (en)
French (fr)
Inventor
John D. Everard
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
Application granted granted Critical
Publication of CA1113609A publication Critical patent/CA1113609A/en
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
    • H03M7/302—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
    • H03M7/3028—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 single bit one
    • 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
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
CA291,422A 1976-12-01 1977-11-22 Code converters Expired CA1113609A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB50096/76A GB1580447A (en) 1976-12-01 1976-12-01 Code converters
GB50096/76 1976-12-01

Publications (1)

Publication Number Publication Date
CA1113609A true CA1113609A (en) 1981-12-01

Family

ID=10454647

Family Applications (1)

Application Number Title Priority Date Filing Date
CA291,422A Expired CA1113609A (en) 1976-12-01 1977-11-22 Code converters

Country Status (8)

Country Link
US (1) US4209773A (US20100012521A1-20100121-C00001.png)
JP (1) JPS6026330B2 (US20100012521A1-20100121-C00001.png)
CA (1) CA1113609A (US20100012521A1-20100121-C00001.png)
DE (1) DE2753616A1 (US20100012521A1-20100121-C00001.png)
FR (1) FR2373193A1 (US20100012521A1-20100121-C00001.png)
GB (1) GB1580447A (US20100012521A1-20100121-C00001.png)
NL (1) NL188132C (US20100012521A1-20100121-C00001.png)
SE (1) SE428256B (US20100012521A1-20100121-C00001.png)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064276B (en) * 1978-12-05 1982-09-08 Standard Telephones Cables Ltd Analogue to digital converters
US4528551A (en) * 1979-11-28 1985-07-09 International Telephone And Telegraph Corporation Digital to analog converter employing sigma-delta modulation for use in telephone systems
GB2107949B (en) * 1981-10-15 1985-04-11 Standard Telephones Cables Ltd Digital decoder
US4542369A (en) * 1982-08-19 1985-09-17 Victor Company Of Japan, Ltd. Digital-to-analog converting device
FR2543380B1 (fr) * 1983-03-24 1985-07-26 Labo Cent Telecommunicat Procede et dispositif de transcodage d'un signal numerique mic et application au codage analogique-numerique d'un signal analogique a large bande
USRE34660E (en) * 1983-07-29 1994-07-12 Burr-Brown Corporation Apparatus and methods for digital-to-analog conversion using modified LSB switching
GB8427325D0 (en) * 1984-10-29 1984-12-05 Plessey Co Plc Digital to analogue conversion
JPH0697743B2 (ja) * 1985-04-17 1994-11-30 株式会社日立製作所 オ−バサンプル形ｄ／ａ変換器
US4812815A (en) * 1985-12-25 1989-03-14 Sharp Kabushiki Kaisha Digital-to-analog converter system
US4755794A (en) * 1987-07-23 1988-07-05 American Telephone And Telegraph Company, At&T Bell Laboratories Digital-to-digital code converter
JP2543095B2 (ja) * 1987-09-14 1996-10-16 松下電器産業株式会社 オ―バ―サンプリング型ｄ／ａ変換器
DE3780640T2 (de) * 1987-10-19 1993-03-11 Ibm Offset-korrekturschaltung fuer eine sigma-delta-kodierungsvorrichtung.
JP2716140B2 (ja) * 1988-04-04 1998-02-18 富士通株式会社 コード変換器及びエンコーダ装置
US4901077A (en) * 1988-04-18 1990-02-13 Thomson Consumer Electronics, Inc. Sigma-delta modulator for D-to-A converter
DE3934215A1 (de) * 1989-10-13 1991-04-18 Rheydt Kabelwerk Ag Digital/analogsystem
US5101204A (en) * 1990-03-26 1992-03-31 Burr-Brown Corporation Interpolation DAC and method
EP1024348B1 (en) * 1999-01-28 2011-07-27 Denso Corporation Low-frequency noise removing method and a related CMOS sensing circuit
WO2004098065A1 (en) * 2003-03-28 2004-11-11 Ess Technology, Inc. Bi-quad digital filter configured with a bit binary rate multiplier
US7456766B2 (en) * 2006-07-19 2008-11-25 Qualcomm Incorporated Sigma-delta modulation with offset
JP2009534874A (ja) * 2006-01-11 2009-09-24 クゥアルコム・インコーポレイテッド オフセットを用いるシグマ−デルタ変調
RU181022U1 (ru) * 2018-04-12 2018-07-03 Федеральное государственное бюджетное образовательное учреждение высшего образования "МИРЭА - Российский технологический университет" Многовходовой цифровой сумматор импульсных потоков

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292173A (en) * 1963-09-25 1966-12-13 Gen Motors Corp Digital decoding apparatus
US3603773A (en) * 1969-08-28 1971-09-07 Vernitron Corp Digital pulse rate generator
US3772678A (en) * 1970-06-10 1973-11-13 Univ Sherbrooke Converter from pulse code modulation to delta modulation
US3668560A (en) * 1970-07-09 1972-06-06 Research Corp Pulse-width frequency modulation device
US3757261A (en) * 1972-02-11 1973-09-04 Collins Radio Co Integration and filtration circuit apparatus
US4006475A (en) * 1973-12-04 1977-02-01 Bell Telephone Laboratories, Incorporated Digital-to-analog converter with digitally distributed amplitude supplement
GB1444216A (en) * 1975-02-20 1976-07-28 Standard Telephones Cables Ltd D/a converter for pcm
US4079373A (en) * 1976-08-19 1978-03-14 Rockwell International Corporation Digital-to-analog conversion apparatus using temperature compensated feedback output amplifier
US4086656A (en) * 1976-10-21 1978-04-25 Rockwell International Corporation Analog-to-digital integrating apparatus with pulse density conversion prior to accumulation

Also Published As

Publication number Publication date
FR2373193A1 (fr) 1978-06-30
NL7713163A (nl) 1978-06-05
SE428256B (sv) 1983-06-13
US4209773A (en) 1980-06-24
JPS5368966A (en) 1978-06-19
SE7713519L (sv) 1978-06-02
NL188132C (nl) 1992-04-01
FR2373193B1 (US20100012521A1-20100121-C00001.png) 1983-01-28
GB1580447A (en) 1980-12-03
DE2753616C2 (US20100012521A1-20100121-C00001.png) 1987-01-29
NL188132B (nl) 1991-11-01
JPS6026330B2 (ja) 1985-06-22
DE2753616A1 (de) 1978-06-08

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