GB924314A - Digital-to-analog converter - Google Patents

Digital-to-analog converter

Info

Publication number
GB924314A
GB924314A GB311762A GB311762A GB924314A GB 924314 A GB924314 A GB 924314A GB 311762 A GB311762 A GB 311762A GB 311762 A GB311762 A GB 311762A GB 924314 A GB924314 A GB 924314A
Authority
GB
United Kingdom
Prior art keywords
relay
energized
analogue
current
passed
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
GB311762A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB924314A publication Critical patent/GB924314A/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
    • H03M1/80—Simultaneous conversion using weighted impedances
    • H03M1/808—Simultaneous conversion using weighted impedances using resistors

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

924,314. Digital to analogue converters. GENERAL ELECTRIC CO. Jan. 26, 1962 [Feb. 28, 1961], No. 3117/62. Class 40 (1). A digital to analogue converter comprises a number of relay circuits each of which is such that one contact provides both a holding current for the relay and an analogue current. Serial data signals are passed to a register 10 and are read out in parallel by AND gates 17-20 controlled by a timing pulse: relays K1-K4 are thereby set to represent the signal. Meanwhile, new data signals can be passed to the register, gates 17-20 being blocked. Contacts K1a- K4a select one or other of two voltages, dependent on the corresponding data bit, which voltage is passed to one or other of two converter units C11-C12, selection being by way of relays K11, K12. Each section of a converter unit, e.g. section 41, comprises a circuit including relay K41. If K1 is energized momentarilyindicating a "0"-K41 is earthed and is energized, whereby contact K41a reverses and holds the relay K41 energized. Resistor 45 is weighted so that a current proportional to the data bit passes to a summing amplifier when K41 is not energized, the analogue signal then appearing at 55. If now relay K1 is de-energized, representing a " 1," relay K41 is shorted and contact K41a connects resistor 46 in circuit thereby to apply a weighted current to the output.
GB311762A 1961-02-28 1962-01-26 Digital-to-analog converter Expired GB924314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9223461A 1961-02-28 1961-02-28

Publications (1)

Publication Number Publication Date
GB924314A true GB924314A (en) 1963-04-24

Family

ID=22232296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB311762A Expired GB924314A (en) 1961-02-28 1962-01-26 Digital-to-analog converter

Country Status (2)

Country Link
DE (1) DE1412991A1 (en)
GB (1) GB924314A (en)

Also Published As

Publication number Publication date
DE1412991A1 (en) 1968-10-03

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