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JPS56126319A - Self-correcting analog-digital converter - Google Patents

Self-correcting analog-digital converter

Info

Publication number
JPS56126319A
JPS56126319A JP2919780A JP2919780A JPS56126319A JP S56126319 A JPS56126319 A JP S56126319A JP 2919780 A JP2919780 A JP 2919780A JP 2919780 A JP2919780 A JP 2919780A JP S56126319 A JPS56126319 A JP S56126319A
Authority
JP
Japan
Prior art keywords
converter
conversion
self
circuit
switch
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
JP2919780A
Other languages
Japanese (ja)
Inventor
Yasunori Kanazawa
Masaharu Kobayashi
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 JP2919780A priority Critical patent/JPS56126319A/en
Publication of JPS56126319A publication Critical patent/JPS56126319A/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

Landscapes

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

Abstract

PURPOSE:To realize an A/D converter having high accuracy, by providing a self- correcting means. CONSTITUTION:With an application of the calibration signal to the terminal 5, the reference staircase wave generating circuit 6 starts its operation. At the same time, the digital pattern generating circuit 7 also starts operation, and a digital code is generated for the analog voltage level corresponding to each step. The staircase wave is applied to the A/D converter 9 via the switch 8. The converter 9 performs an A/D conversion for each step and compares the result of conversion with the reference digital quantity sent from the circuit 7 through the subtractor circuit 10 and with every step to obtain the difference that is stored in the memory 11. For actuation of the A/D converter, the switch 8 is switched and an A/D conversion is given to the input analog voltage applied to the terminal 1 through the converter 9. This result of conversion is applied to the memory 11 and then delivered with an addition of the stored degree of compensation.
JP2919780A 1980-03-10 1980-03-10 Self-correcting analog-digital converter Pending JPS56126319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2919780A JPS56126319A (en) 1980-03-10 1980-03-10 Self-correcting analog-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2919780A JPS56126319A (en) 1980-03-10 1980-03-10 Self-correcting analog-digital converter

Publications (1)

Publication Number Publication Date
JPS56126319A true JPS56126319A (en) 1981-10-03

Family

ID=12269463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2919780A Pending JPS56126319A (en) 1980-03-10 1980-03-10 Self-correcting analog-digital converter

Country Status (1)

Country Link
JP (1) JPS56126319A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03276968A (en) * 1989-09-19 1991-12-09 Ikegami Tsushinki Co Ltd Method and circuit for error correction for nonlinear quantization circuit
US5332996A (en) * 1993-06-30 1994-07-26 At&T Bell Laboratories Method and apparatus for all code testing
US5483237A (en) * 1994-01-31 1996-01-09 At&T Corp. Method and apparatus for testing a CODEC

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458341A (en) * 1977-10-19 1979-05-11 Hitachi Ltd Ad conversion method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458341A (en) * 1977-10-19 1979-05-11 Hitachi Ltd Ad conversion method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03276968A (en) * 1989-09-19 1991-12-09 Ikegami Tsushinki Co Ltd Method and circuit for error correction for nonlinear quantization circuit
US5332996A (en) * 1993-06-30 1994-07-26 At&T Bell Laboratories Method and apparatus for all code testing
US5483237A (en) * 1994-01-31 1996-01-09 At&T Corp. Method and apparatus for testing a CODEC

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