JPS5458341A - Ad conversion method - Google Patents
Ad conversion methodInfo
- 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
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
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)
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)
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 |
-
1977
- 1977-10-19 JP JP12451477A patent/JPS5458341A/en active Granted
Patent Citations (2)
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 (9)
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 |
JPS6223710B2 (en) * | 1981-06-01 | 1987-05-25 | Mitsubishi Electric Corp | |
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 |
JPH026147B2 (en) * | 1983-08-12 | 1990-02-07 | Hitachi Ltd | |
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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