JPS5458341A - Ad conversion method - Google Patents

Ad conversion method

Info

Publication number
JPS5458341A
JPS5458341A JP12451477A JP12451477A JPS5458341A JP S5458341 A JPS5458341 A JP S5458341A JP 12451477 A JP12451477 A JP 12451477A JP 12451477 A JP12451477 A JP 12451477A JP S5458341 A JPS5458341 A JP S5458341A
Authority
JP
Japan
Prior art keywords
converter
output
bit
memory
accuracy
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.)
Granted
Application number
JP12451477A
Other languages
Japanese (ja)
Other versions
JPS6259492B2 (en
Inventor
Kenji Maio
Masao Hotta
Norio Yokozawa
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 JP12451477A priority Critical patent/JPS5458341A/en
Publication of JPS5458341A publication Critical patent/JPS5458341A/en
Publication of JPS6259492B2 publication Critical patent/JPS6259492B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)
  • Error Detection And Correction (AREA)

Abstract

PURPOSE: To make accurate the A/D converter of poor accuracy and to enable to made easy circuit integration, by adding the digital memory memorizing correct value to the circuit.
CONSTITUTION: The output of high accuracy 4 can be obtained by memorizing 2 the correct value from the reference A/D converter 5 to all the outputs of the A/D converter 1 of poor accuracy and by separating the converter 5 after the completion of memory. Further, if the accuracy of upper rank 4-bit is poor and the error is corrected at the 4-bit of lower rank, the difference between the output of the A/D converter 11 of poor accuracy and the output of the refernce A/D converter 51 is obtained at the subtractor 71. Next, the signals 3-1 to 3-4 of the higher rank 4-bit are written in the memory address 21 for the address. Similarly, the input voltage is sequentially changed and the error in the upper rank 4-bit of the converter 11 is all memorized 21. Next, the memory 21 is read out and it is converted into readout mode, allowing to each corrective output according to the outputs 3-1 to 3-4. This is added 72 to the outputs 3-1 to 3-4 and accurate output 8 can obtained
COPYRIGHT: (C)1979,JPO&Japio
JP12451477A 1977-10-19 1977-10-19 Ad conversion method Granted JPS5458341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12451477A JPS5458341A (en) 1977-10-19 1977-10-19 Ad conversion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12451477A JPS5458341A (en) 1977-10-19 1977-10-19 Ad conversion method

Publications (2)

Publication Number Publication Date
JPS5458341A true JPS5458341A (en) 1979-05-11
JPS6259492B2 JPS6259492B2 (en) 1987-12-11

Family

ID=14887361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12451477A Granted JPS5458341A (en) 1977-10-19 1977-10-19 Ad conversion method

Country Status (1)

Country Link
JP (1) JPS5458341A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635532A (en) * 1979-08-31 1981-04-08 Hitachi Ltd A/d converter
JPS56126319A (en) * 1980-03-10 1981-10-03 Hitachi Ltd Self-correcting analog-digital converter
JPS57199772A (en) * 1981-06-01 1982-12-07 Mitsubishi Electric Corp Controller for speed of elevator
US4415882A (en) * 1981-07-13 1983-11-15 Nippon Telegraph & Telephone Public Corporation Analog to digital converter
JPS5952416A (en) * 1983-08-12 1984-03-27 Hitachi Ltd Pcm sound recording and reproducing device
US4843395A (en) * 1987-09-11 1989-06-27 Hughes Aircraft Company Large dynamic range analog to digital converter
US4973974A (en) * 1987-09-08 1990-11-27 Kabushiki Kaisha Toshiba Multi-stage analog-to-digital converting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51128254A (en) * 1975-04-30 1976-11-09 Mitsubishi Electric Corp Analog-digital converter
JPS5242058A (en) * 1975-09-29 1977-04-01 Kubota Ltd Digital analog convertor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51128254A (en) * 1975-04-30 1976-11-09 Mitsubishi Electric Corp Analog-digital converter
JPS5242058A (en) * 1975-09-29 1977-04-01 Kubota Ltd Digital analog convertor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635532A (en) * 1979-08-31 1981-04-08 Hitachi Ltd A/d converter
JPS56126319A (en) * 1980-03-10 1981-10-03 Hitachi Ltd Self-correcting analog-digital converter
JPS57199772A (en) * 1981-06-01 1982-12-07 Mitsubishi Electric Corp Controller for speed of elevator
US4415882A (en) * 1981-07-13 1983-11-15 Nippon Telegraph & Telephone Public Corporation Analog to digital converter
JPS5952416A (en) * 1983-08-12 1984-03-27 Hitachi Ltd Pcm sound recording and reproducing device
US4973974A (en) * 1987-09-08 1990-11-27 Kabushiki Kaisha Toshiba Multi-stage analog-to-digital converting device
US4843395A (en) * 1987-09-11 1989-06-27 Hughes Aircraft Company Large dynamic range analog to digital converter

Also Published As

Publication number Publication date
JPS6259492B2 (en) 1987-12-11

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