ES445387A1 - D/a converter for pcm - Google Patents

D/a converter for pcm

Info

Publication number
ES445387A1
ES445387A1 ES445387A ES445387A ES445387A1 ES 445387 A1 ES445387 A1 ES 445387A1 ES 445387 A ES445387 A ES 445387A ES 445387 A ES445387 A ES 445387A ES 445387 A1 ES445387 A1 ES 445387A1
Authority
ES
Spain
Prior art keywords
signal
elements
significant bits
converter
pcm
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
ES445387A
Other languages
Spanish (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 ES445387A1 publication Critical patent/ES445387A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Networks Using Active Elements (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

A digital-to-analog converter for a pulse coded modulated signal comprising elements for increasing the sampling rate of the signal, elements for selecting a predetermined number of the most significant bits of each code group of the increased sample rate signal, and elements to convert said most significant bits into a pulse flow whose density is proportional to the amplitude of the signal. (Machine-translation by Google Translate, not legally binding)
ES445387A 1975-02-20 1976-02-20 D/a converter for pcm Expired ES445387A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB715775A GB1444216A (en) 1975-02-20 1975-02-20 D/a converter for pcm

Publications (1)

Publication Number Publication Date
ES445387A1 true ES445387A1 (en) 1977-06-16

Family

ID=9827708

Family Applications (1)

Application Number Title Priority Date Filing Date
ES445387A Expired ES445387A1 (en) 1975-02-20 1976-02-20 D/a converter for pcm

Country Status (19)

Country Link
JP (1) JPS51135354A (en)
AR (1) AR212019A1 (en)
AT (1) AT377397B (en)
AU (1) AU497002B2 (en)
BE (1) BE838666A (en)
BR (1) BR7601013A (en)
CA (1) CA1093697A (en)
CH (1) CH607456A5 (en)
DE (1) DE2605724C2 (en)
DK (1) DK148866C (en)
ES (1) ES445387A1 (en)
FR (1) FR2301971A1 (en)
GB (1) GB1444216A (en)
IN (1) IN143625B (en)
IT (1) IT1054867B (en)
NL (1) NL7601414A (en)
NO (1) NO143776C (en)
SE (1) SE410929B (en)
SU (1) SU1132805A3 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228205A (en) * 1975-08-28 1977-03-03 Sony Corp Station selector unit
GB1580447A (en) * 1976-12-01 1980-12-03 Post Office Code converters
NL7801909A (en) * 1978-02-21 1979-08-23 Philips Nv DEVICE FOR DECODING A SIGNAL CODED WITH ADAPTIVE DELTA MODULATION.
DE3021012C2 (en) * 1980-06-03 1985-08-22 ANT Nachrichtentechnik GmbH, 7150 Backnang Generalized interpolative method for the digital-analog conversion of PCM signals
US4313173A (en) * 1980-06-10 1982-01-26 Bell Telephone Laboratories, Incorporated Linear interpolator
GB2107949B (en) * 1981-10-15 1985-04-11 Standard Telephones Cables Ltd Digital decoder
DE3203012A1 (en) * 1982-01-29 1983-08-04 Siemens AG, 1000 Berlin und 8000 München Method and circuit arrangement for generating interpolation values between stored samples
US4786923A (en) * 1982-09-07 1988-11-22 Canon Kabushiki Kaisha Image recording system for image recording in response to signals entered from a recording information generating unit
EP0437301A3 (en) * 1983-07-29 1991-09-25 Burr-Brown Corporation Apparatus and methods for digital-to-analogue conversion
USRE34660E (en) * 1983-07-29 1994-07-12 Burr-Brown Corporation Apparatus and methods for digital-to-analog conversion using modified LSB switching
JPS60106229A (en) * 1983-11-14 1985-06-11 Rohm Co Ltd D/a converting circuit of digital pwm circuit
JPS6184118A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184117A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184119A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPH0824267B2 (en) * 1984-10-02 1996-03-06 キヤノン株式会社 Data processing device
JPS6184120A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
DE3535021A1 (en) * 1984-10-02 1986-04-17 Canon K.K., Tokio/Tokyo DIGITAL / ANALOG CONVERSION DEVICE
GB2183115A (en) * 1985-11-15 1987-05-28 Philips Electronic Associated Digital to analogue converter
DE3709207A1 (en) * 1987-02-28 1988-09-08 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR CONVERTING DIGITAL TONE SIGNAL VALUES TO ANALOG TONE
GB9103777D0 (en) * 1991-02-22 1991-04-10 B & W Loudspeakers Analogue and digital convertors
GB2319411B (en) * 1996-11-18 2000-11-15 Fujitsu Ltd Modem signal transmission and/or reception apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110894A (en) * 1959-04-09 1963-11-12 Itt Digital-to-analog converter
US3532864A (en) * 1967-08-08 1970-10-06 United Aircraft Corp Linear interpolation function generation

Also Published As

Publication number Publication date
NO760428L (en) 1976-08-23
SE7601666L (en) 1976-08-23
BR7601013A (en) 1976-09-14
NL7601414A (en) 1976-08-24
GB1444216A (en) 1976-07-28
DK148866B (en) 1985-10-28
BE838666A (en) 1976-08-18
AU497002B2 (en) 1978-11-16
IT1054867B (en) 1981-11-30
DE2605724C2 (en) 1986-01-23
DK148866C (en) 1986-04-21
AT377397B (en) 1985-03-11
IN143625B (en) 1978-01-07
CH607456A5 (en) 1978-12-29
AR212019A1 (en) 1978-04-28
SE410929B (en) 1979-11-12
SU1132805A3 (en) 1984-12-30
FR2301971B1 (en) 1982-07-23
NO143776B (en) 1980-12-29
FR2301971A1 (en) 1976-09-17
DE2605724A1 (en) 1976-09-02
ATA121476A (en) 1984-07-15
NO143776C (en) 1981-04-08
CA1093697A (en) 1981-01-13
DK64976A (en) 1976-08-21
AU1110076A (en) 1977-08-18
JPS51135354A (en) 1976-11-24
JPS5542774B2 (en) 1980-11-01

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970226