JPS6422114A - Ad converter circuit - Google Patents
Ad converter circuitInfo
- Publication number
- JPS6422114A JPS6422114A JP17825687A JP17825687A JPS6422114A JP S6422114 A JPS6422114 A JP S6422114A JP 17825687 A JP17825687 A JP 17825687A JP 17825687 A JP17825687 A JP 17825687A JP S6422114 A JPS6422114 A JP S6422114A
- Authority
- JP
- Japan
- Prior art keywords
- conversion
- rsff
- resolution
- reference voltage
- sampling time
- 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
Links
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To cause a resolution and an accuracy to be variable by using a reference voltage circuit to change hourly for the reference voltage generating circuit of an AD converter and changing a sampling time. CONSTITUTION:A programmable clock generator 15 is used as a sampling time base, an RSFF 13 is reset after an (n) pulse as a shift clock 16, an FET 10 is turned off and an AD conversion is completed. A CPU, when an AD converting completing signal comes from an (n) counter 14, fetches data into a data bus line. An AD converting start sets the RSFF 13 and starts. By using the I/O of a single chip microcomputer, a constant current value is made variable, a non-linear conversion can be executed by the occasional full scale conversion, and the resolution can be also determined by the number of the bits of a register placed in a RAM.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17825687A JPS6422114A (en) | 1987-07-16 | 1987-07-16 | Ad converter circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17825687A JPS6422114A (en) | 1987-07-16 | 1987-07-16 | Ad converter circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6422114A true JPS6422114A (en) | 1989-01-25 |
Family
ID=16045312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17825687A Pending JPS6422114A (en) | 1987-07-16 | 1987-07-16 | Ad converter circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6422114A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102347770A (en) * | 2011-08-26 | 2012-02-08 | 中国北车集团大连机车研究所有限公司 | Locomotive auxiliary control unit sampling and processing circuit |
JP2015133631A (en) * | 2014-01-14 | 2015-07-23 | 三菱電機株式会社 | Analog-digital converter |
-
1987
- 1987-07-16 JP JP17825687A patent/JPS6422114A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102347770A (en) * | 2011-08-26 | 2012-02-08 | 中国北车集团大连机车研究所有限公司 | Locomotive auxiliary control unit sampling and processing circuit |
JP2015133631A (en) * | 2014-01-14 | 2015-07-23 | 三菱電機株式会社 | Analog-digital converter |
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