JPS57160216A - A/d and d/a converter - Google Patents

A/d and d/a converter

Info

Publication number
JPS57160216A
JPS57160216A JP4469881A JP4469881A JPS57160216A JP S57160216 A JPS57160216 A JP S57160216A JP 4469881 A JP4469881 A JP 4469881A JP 4469881 A JP4469881 A JP 4469881A JP S57160216 A JPS57160216 A JP S57160216A
Authority
JP
Japan
Prior art keywords
positive
swb
negative
ground potential
converter
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.)
Pending
Application number
JP4469881A
Other languages
Japanese (ja)
Inventor
Toshihiko Matsumura
Kunihiko Goto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4469881A priority Critical patent/JPS57160216A/en
Publication of JPS57160216A publication Critical patent/JPS57160216A/en
Pending 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

PURPOSE:To simplify a decoding circuit by switching a reference and a ground potential applied to a resistant line according to whether an input signal is positive or negative. CONSTITUTION:A D/A converter has switches SWA and SWB for switching a reference potential VREF and a ground potential, applied to both the ends of a resistance line BA, according to the contents of the code bit SB of an input digital signal DIN. In charging mode, the switches SWA and SWB are connected to the right side or left side according to whether the signal DIN is positive or negative. In output mode, when the signal DIN is positive, the switches SWA and SWB are connected to the left side to switch the reference potential VREF and ground potential. Consequently, it is unnecessary to make the control signal of each switch different according to the input signal is positive or negative, and a decoding circuit DEC' is simplified. Further, this system is applicable to an A/D converter.
JP4469881A 1981-03-28 1981-03-28 A/d and d/a converter Pending JPS57160216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4469881A JPS57160216A (en) 1981-03-28 1981-03-28 A/d and d/a converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4469881A JPS57160216A (en) 1981-03-28 1981-03-28 A/d and d/a converter

Publications (1)

Publication Number Publication Date
JPS57160216A true JPS57160216A (en) 1982-10-02

Family

ID=12698630

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4469881A Pending JPS57160216A (en) 1981-03-28 1981-03-28 A/d and d/a converter

Country Status (1)

Country Link
JP (1) JPS57160216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6192029A (en) * 1984-09-21 1986-05-10 ソシエテ、プール、レテユード、エ、ラ、フアブリカシオン、ド、シルキユイ、アンテグル、スペシユー‐ウエフセイエス Analog signal level detector
JPS62224123A (en) * 1986-03-26 1987-10-02 Hitachi Ltd Coder/decoder circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6192029A (en) * 1984-09-21 1986-05-10 ソシエテ、プール、レテユード、エ、ラ、フアブリカシオン、ド、シルキユイ、アンテグル、スペシユー‐ウエフセイエス Analog signal level detector
JPS62224123A (en) * 1986-03-26 1987-10-02 Hitachi Ltd Coder/decoder circuit

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