GB1517199A - Signal converters - Google Patents

Signal converters

Info

Publication number
GB1517199A
GB1517199A GB40911/75A GB4091175A GB1517199A GB 1517199 A GB1517199 A GB 1517199A GB 40911/75 A GB40911/75 A GB 40911/75A GB 4091175 A GB4091175 A GB 4091175A GB 1517199 A GB1517199 A GB 1517199A
Authority
GB
United Kingdom
Prior art keywords
digits
sources
current sources
converter
weighted resistors
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
GB40911/75A
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
Publication of GB1517199A publication Critical patent/GB1517199A/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
    • H03M1/66—Digital/analogue converters
    • H03M1/74—Simultaneous conversion

Landscapes

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

Abstract

1517199 Digital-to-analogue converter INTERNATIONAL BUSINESS MACHINES CORP 7 Oct 1975 [15 Nov 1974] 40911/75 Heading H3H In a d-to-a converter the current sources switchable by a logic net dependent on receiving digital signals to a summing point comprise both sources 41, 43 using weighted resistors, for the v.s. digits, and sources 40, 42, 44 using multiple basic current sources, for the m.s. digits. To provide for balanced thermal effects, when the device is an integrated circuit, the current sources for the m.s. digits are rested, and the binary weighted resistors of the v.s. digits are adjusted in value to compensate for the different impedences of identical transistors operating at different currents.
GB40911/75A 1974-11-15 1975-10-07 Signal converters Expired GB1517199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52430274A 1974-11-15 1974-11-15

Publications (1)

Publication Number Publication Date
GB1517199A true GB1517199A (en) 1978-07-12

Family

ID=24088631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40911/75A Expired GB1517199A (en) 1974-11-15 1975-10-07 Signal converters

Country Status (8)

Country Link
JP (1) JPS5639091B2 (en)
BR (1) BR7507577A (en)
CA (1) CA1114510A (en)
DE (1) DE2536633A1 (en)
FR (1) FR2291649A1 (en)
GB (1) GB1517199A (en)
IT (1) IT1043515B (en)
MX (1) MX143429A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695826A (en) * 1985-04-17 1987-09-22 Mitsubishi Denki Kabushiki Kaisha High accuracy digital-to-analog converter having symmetrical current source switching

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2803099C3 (en) * 1978-01-25 1986-07-10 Hans-Ulrich 5810 Witten Post Digital-to-analog converter in integrated circuit technology
FR2454726A1 (en) * 1979-04-19 1980-11-14 Laures Antoine ULTRA-FAST DIGITAL-TO-ANALOG CONVERTER
JPS57194625A (en) * 1981-05-27 1982-11-30 Nec Corp Digital to analog converter
EP0074436B1 (en) * 1981-09-10 1985-04-10 Deutsche ITT Industries GmbH Monolithic integrated da convertor with bipolar transistors
JPS5954322A (en) * 1982-09-22 1984-03-29 Hitachi Ltd Digital-analog converter
JPH0779244B2 (en) * 1985-07-24 1995-08-23 株式会社日立マイコンシステム Semiconductor integrated circuit device
US4769632A (en) * 1986-02-10 1988-09-06 Inmos Limited Color graphics control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695826A (en) * 1985-04-17 1987-09-22 Mitsubishi Denki Kabushiki Kaisha High accuracy digital-to-analog converter having symmetrical current source switching

Also Published As

Publication number Publication date
BR7507577A (en) 1976-08-31
DE2536633A1 (en) 1976-05-20
FR2291649B1 (en) 1978-04-07
JPS5168763A (en) 1976-06-14
IT1043515B (en) 1980-02-29
FR2291649A1 (en) 1976-06-11
JPS5639091B2 (en) 1981-09-10
MX143429A (en) 1981-05-12
CA1114510A (en) 1981-12-15

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Legal Events

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