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JPS5635532A - A/d converter - Google Patents

A/d converter

Info

Publication number
JPS5635532A
JPS5635532A JP11039879A JP11039879A JPS5635532A JP S5635532 A JPS5635532 A JP S5635532A JP 11039879 A JP11039879 A JP 11039879A JP 11039879 A JP11039879 A JP 11039879A JP S5635532 A JPS5635532 A JP S5635532A
Authority
JP
Japan
Prior art keywords
converter
comparing
circuit
comparator
compensation
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
JP11039879A
Other languages
Japanese (ja)
Inventor
Yasunori Kanazawa
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 JP11039879A priority Critical patent/JPS5635532A/en
Publication of JPS5635532A publication Critical patent/JPS5635532A/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
    • H03M1/10—Calibration or testing
    • H03M1/1009—Calibration
    • H03M1/1033—Calibration over the full range of the converter, e.g. for correcting differential non-linearity
    • H03M1/1038—Calibration over the full range of the converter, e.g. for correcting differential non-linearity by storing corrected or correction values in one or more digital look-up tables
    • H03M1/1047—Calibration over the full range of the converter, e.g. for correcting differential non-linearity by storing corrected or correction values in one or more digital look-up tables using an auxiliary digital/analogue converter for adding the correction values to the analogue signal
    • 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
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter

Landscapes

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

Abstract

PURPOSE:To obtain a D/A converter having a low accuracy, by applying the reference data to the D/A converter functioning as a local decorder to measure the accuracy and then storing the extent of compensation to be applied to each digit of the D/A converter. CONSTITUTION:The input analog signal (reference voltage for calibration) sampled and held is compared with the output of the D/A converter 3 functioning as a local decoder through the comparator 2, and then sent to the comparing register 4 successively. Thus an A/D converting action is given. At the same time, the comparing reference signal is obtained through the A/D converter 12 for calibration via other sample holding circuit 11 to be compared with the contents D of the comparing register 4 successively through the comparator 7. Thus the error component E is obtained. This result is stored in the memory circuit 10. And the contents of memory are added to the exclusive OR circuit 8 during the A/D conversion, and thus a compensation is given to the digital signal D.
JP11039879A 1979-08-31 1979-08-31 A/d converter Pending JPS5635532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11039879A JPS5635532A (en) 1979-08-31 1979-08-31 A/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11039879A JPS5635532A (en) 1979-08-31 1979-08-31 A/d converter

Publications (1)

Publication Number Publication Date
JPS5635532A true JPS5635532A (en) 1981-04-08

Family

ID=14534786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11039879A Pending JPS5635532A (en) 1979-08-31 1979-08-31 A/d converter

Country Status (1)

Country Link
JP (1) JPS5635532A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873231A (en) * 1981-10-27 1983-05-02 Shimadzu Corp Analog-to-digital converter
JPS59171221A (en) * 1983-03-17 1984-09-27 Kokusai Electric Co Ltd Method for correcting precision of analog-digital and digital-analog converter
JPS63187921A (en) * 1987-01-30 1988-08-03 Matsushita Electric Ind Co Ltd Analog-to-digital signal converter
JPH0295939U (en) * 1989-01-20 1990-07-31

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132066A (en) * 1975-05-13 1976-11-16 Mitsubishi Electric Corp A-d converter
JPS53120378A (en) * 1977-03-30 1978-10-20 Hitachi Ltd Da converter
JPS5458341A (en) * 1977-10-19 1979-05-11 Hitachi Ltd Ad conversion method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132066A (en) * 1975-05-13 1976-11-16 Mitsubishi Electric Corp A-d converter
JPS53120378A (en) * 1977-03-30 1978-10-20 Hitachi Ltd Da converter
JPS5458341A (en) * 1977-10-19 1979-05-11 Hitachi Ltd Ad conversion method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873231A (en) * 1981-10-27 1983-05-02 Shimadzu Corp Analog-to-digital converter
JPS59171221A (en) * 1983-03-17 1984-09-27 Kokusai Electric Co Ltd Method for correcting precision of analog-digital and digital-analog converter
JPS63187921A (en) * 1987-01-30 1988-08-03 Matsushita Electric Ind Co Ltd Analog-to-digital signal converter
JPH0295939U (en) * 1989-01-20 1990-07-31

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Legal Events

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Effective date: 20050303

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