JPS5533303A - Analog-digital converter - Google Patents
Analog-digital converterInfo
- Publication number
- JPS5533303A JPS5533303A JP10481578A JP10481578A JPS5533303A JP S5533303 A JPS5533303 A JP S5533303A JP 10481578 A JP10481578 A JP 10481578A JP 10481578 A JP10481578 A JP 10481578A JP S5533303 A JPS5533303 A JP S5533303A
- Authority
- JP
- Japan
- Prior art keywords
- divider
- converter
- frequency
- division ratio
- reference voltage
- 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
Abstract
PURPOSE: To ensure a high-accuracy A/D conversion with no effect of the drift as well as to realize a low cost by supplying the reference voltage to the voltage-frequency converter and then setting the division ratio of the variable divider in accordance with the output frequency at the supply time of the reference voltage.
CONSTITUTION: Register 28 which sets the division ratio between reference voltage generator 26, variable divider 27 and divider 27 is provided in order to compensate the gain drift of voltage-frequency converter 22. Reference voltage VN of generator 26 is supplied to converter 22, and the division ratio of divider 27 is varied in accordance with frequency fi obtained at the output terminal of converter 22. Thus the gain drift can be compensated for converter 22. In other words, the gain drift of converter 22 is compensated at the out put terminal of divider 27 by setting the division ratio so that output frequency f0 of divider 27 may be constant to the same VN. Thus the correct frequency can be obtained at the output of divider 27 and according to the input voltage by supplying analog input voltage Vi next instead of VN. And a subtraction is given to counter 23 to obtain digital conversion value D.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10481578A JPS6013615B2 (en) | 1978-08-30 | 1978-08-30 | Analog to digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10481578A JPS6013615B2 (en) | 1978-08-30 | 1978-08-30 | Analog to digital converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5533303A true JPS5533303A (en) | 1980-03-08 |
JPS6013615B2 JPS6013615B2 (en) | 1985-04-08 |
Family
ID=14390896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10481578A Expired JPS6013615B2 (en) | 1978-08-30 | 1978-08-30 | Analog to digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6013615B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58116655A (en) * | 1981-12-28 | 1983-07-11 | Kikkoman Corp | Preparation of soy sauce |
JPS58146128A (en) * | 1982-02-24 | 1983-08-31 | Nec Corp | Analog-to-digital conversion circuit |
JPS63180220A (en) * | 1987-01-22 | 1988-07-25 | Fuji Electric Co Ltd | Analog/digital converter |
-
1978
- 1978-08-30 JP JP10481578A patent/JPS6013615B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58116655A (en) * | 1981-12-28 | 1983-07-11 | Kikkoman Corp | Preparation of soy sauce |
JPS6225025B2 (en) * | 1981-12-28 | 1987-06-01 | Kikkoman Corp | |
JPS58146128A (en) * | 1982-02-24 | 1983-08-31 | Nec Corp | Analog-to-digital conversion circuit |
JPS63180220A (en) * | 1987-01-22 | 1988-07-25 | Fuji Electric Co Ltd | Analog/digital converter |
Also Published As
Publication number | Publication date |
---|---|
JPS6013615B2 (en) | 1985-04-08 |
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