JPS57178417A - Digital to analog converting circuit - Google Patents

Digital to analog converting circuit

Info

Publication number
JPS57178417A
JPS57178417A JP56062438A JP6243881A JPS57178417A JP S57178417 A JPS57178417 A JP S57178417A JP 56062438 A JP56062438 A JP 56062438A JP 6243881 A JP6243881 A JP 6243881A JP S57178417 A JPS57178417 A JP S57178417A
Authority
JP
Japan
Prior art keywords
bit
signal
switch
digital
msb
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
JP56062438A
Other languages
Japanese (ja)
Inventor
Tsutomu Noda
Takao Arai
Isao Akitake
Takaharu Noguchi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56062438A priority Critical patent/JPS57178417A/en
Priority to DE19823215519 priority patent/DE3215519A1/en
Publication of JPS57178417A publication Critical patent/JPS57178417A/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
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type

Landscapes

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

Abstract

PURPOSE:To realize high-precision conversion even when the precision of a current source is inferior, by carrying out the conversion by using independent digital analog converters for a positive and a negative side in accordance with the state of the MSB which shows the sign of an input digital signal. CONSTITUTION:When the MSB of an (n+1)-bit input signal is a 1, a switch 39 is on and a switch 40 is off. Then, an (n)-bit signal is inputted to a digital analog converter (DAC)41 and converted into a prescribed analog signal, which is outputted throgh an operational amplifier 47. When the MSB of the (n+1)-bit input signal is a 0, the switch 39 is off and the switch 40 is on. At this time, the (n)-bit input signal is supplied through an inverter to an (n)-bit DAC42, whose output analog signal is inverted by the operational amplifier 47 and then outputted. Thus, two (n)-bit DACs are used to a realize (n+1)-bit DAC.
JP56062438A 1981-04-27 1981-04-27 Digital to analog converting circuit Pending JPS57178417A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56062438A JPS57178417A (en) 1981-04-27 1981-04-27 Digital to analog converting circuit
DE19823215519 DE3215519A1 (en) 1981-04-27 1982-04-26 Digital/analog converter and/or analog/digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56062438A JPS57178417A (en) 1981-04-27 1981-04-27 Digital to analog converting circuit

Publications (1)

Publication Number Publication Date
JPS57178417A true JPS57178417A (en) 1982-11-02

Family

ID=13200195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56062438A Pending JPS57178417A (en) 1981-04-27 1981-04-27 Digital to analog converting circuit

Country Status (1)

Country Link
JP (1) JPS57178417A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60213125A (en) * 1984-04-06 1985-10-25 Matsushita Electric Ind Co Ltd A/d and d/a converter
JPS60213126A (en) * 1984-04-06 1985-10-25 Matsushita Electric Ind Co Ltd A/d and d/a converter
JPS6322652U (en) * 1986-07-24 1988-02-15
JPS6322651U (en) * 1986-07-24 1988-02-15
JPS6346818A (en) * 1986-08-14 1988-02-27 Nec Corp Midpoint current output type digital/analog converter
JPS63256020A (en) * 1987-04-13 1988-10-24 Matsushita Electric Ind Co Ltd Digital/analog converter
JPH01229524A (en) * 1988-03-10 1989-09-13 Nippon Columbia Co Ltd D/a converter
JPH0398533U (en) * 1990-01-30 1991-10-14

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60213125A (en) * 1984-04-06 1985-10-25 Matsushita Electric Ind Co Ltd A/d and d/a converter
JPS60213126A (en) * 1984-04-06 1985-10-25 Matsushita Electric Ind Co Ltd A/d and d/a converter
JPS6322652U (en) * 1986-07-24 1988-02-15
JPS6322651U (en) * 1986-07-24 1988-02-15
JPS6346818A (en) * 1986-08-14 1988-02-27 Nec Corp Midpoint current output type digital/analog converter
JPS63256020A (en) * 1987-04-13 1988-10-24 Matsushita Electric Ind Co Ltd Digital/analog converter
JPH01229524A (en) * 1988-03-10 1989-09-13 Nippon Columbia Co Ltd D/a converter
JPH0446016B2 (en) * 1988-03-10 1992-07-28 Nippon Columbia
JPH0398533U (en) * 1990-01-30 1991-10-14

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