GB1194307A - Digital to Analog Conversion. - Google Patents

Digital to Analog Conversion.

Info

Publication number
GB1194307A
GB1194307A GB02061/69A GB1206169A GB1194307A GB 1194307 A GB1194307 A GB 1194307A GB 02061/69 A GB02061/69 A GB 02061/69A GB 1206169 A GB1206169 A GB 1206169A GB 1194307 A GB1194307 A GB 1194307A
Authority
GB
United Kingdom
Prior art keywords
fed
digital
converter
currents
transistors
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
GB02061/69A
Inventor
Roger James Houghton
Bashirali Kara
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 Business Machines Corp
Original Assignee
International Business Machines 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 Business Machines Corp filed Critical International Business Machines Corp
Priority to GB02061/69A priority Critical patent/GB1194307A/en
Priority to FR707006056A priority patent/FR2034719B1/fr
Priority to JP45016366A priority patent/JPS49376B1/ja
Priority to DE2010282A priority patent/DE2010282C3/en
Publication of GB1194307A publication Critical patent/GB1194307A/en
Expired 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
    • 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
    • H03M1/74—Simultaneous conversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1,194,307. Digital/analog converters. INTERNATIONAL BUSINESS MACHINES CORP. 7 March, 1969, No. 12061/69. Heading G4H. From a constant current source 10, binary weighted currents are derived by transistors 18, 19, 20, 21, 22 having binary weighted emitter areas, these currents being fed to emitter coupled transistor pairs 24, 25; 26, 27; 28, 29; 30, 31; 32, 33; a binary coded input bit being fed to the base of one transistor 24, 26, 28, 30, 32 in each pair so that an analogue signal representing the digital input signal is fed to a load 13. If the input bits have value n then with the 5 bit converter shown by summing the output currents from the collectors of transistors 25, 27, 29, 31, 33 a current 31-n is fed to a second load 14. The converter is preferably in integrated circuit form, suitable layout for the converter being given (Figs. 2 and 3, not shown).
GB02061/69A 1969-03-07 1969-03-07 Digital to Analog Conversion. Expired GB1194307A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB02061/69A GB1194307A (en) 1969-03-07 1969-03-07 Digital to Analog Conversion.
FR707006056A FR2034719B1 (en) 1969-03-07 1970-02-19
JP45016366A JPS49376B1 (en) 1969-03-07 1970-02-27
DE2010282A DE2010282C3 (en) 1969-03-07 1970-03-05 Digital-to-analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB02061/69A GB1194307A (en) 1969-03-07 1969-03-07 Digital to Analog Conversion.

Publications (1)

Publication Number Publication Date
GB1194307A true GB1194307A (en) 1970-06-10

Family

ID=9997713

Family Applications (1)

Application Number Title Priority Date Filing Date
GB02061/69A Expired GB1194307A (en) 1969-03-07 1969-03-07 Digital to Analog Conversion.

Country Status (4)

Country Link
JP (1) JPS49376B1 (en)
DE (1) DE2010282C3 (en)
FR (1) FR2034719B1 (en)
GB (1) GB1194307A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117914A1 (en) * 1970-12-09 1972-07-28 Philips Nv
FR2126131A1 (en) * 1971-02-26 1972-10-06 Trt Telecom Radio Electr
WO1980002348A1 (en) * 1979-04-19 1980-10-30 A Laures High speed digital-analogue convertor
EP0043897A2 (en) * 1980-04-30 1982-01-20 Nec Corporation Integrated digital-analog converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902140A (en) * 1972-10-18 1975-08-26 Alan B Grebene Digitally controlled oscillator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE572049A (en) * 1957-12-03 1900-01-01
US3401386A (en) * 1964-05-06 1968-09-10 Burroughs Corp Frequency control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117914A1 (en) * 1970-12-09 1972-07-28 Philips Nv
FR2126131A1 (en) * 1971-02-26 1972-10-06 Trt Telecom Radio Electr
WO1980002348A1 (en) * 1979-04-19 1980-10-30 A Laures High speed digital-analogue convertor
FR2454726A1 (en) * 1979-04-19 1980-11-14 Laures Antoine ULTRA-FAST DIGITAL-TO-ANALOG CONVERTER
DE3041442C2 (en) * 1979-04-19 1989-10-05 Antoine Montrouge Fr Laures
EP0043897A2 (en) * 1980-04-30 1982-01-20 Nec Corporation Integrated digital-analog converter
EP0043897A3 (en) * 1980-04-30 1982-08-04 Nec Corporation Integrated digital-analog converter

Also Published As

Publication number Publication date
FR2034719B1 (en) 1973-07-13
DE2010282B2 (en) 1978-12-14
JPS49376B1 (en) 1974-01-07
DE2010282C3 (en) 1979-08-16
FR2034719A1 (en) 1970-12-11
DE2010282A1 (en) 1970-09-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee