JPS6478030A - A/d converting circuit - Google Patents
A/d converting circuitInfo
- Publication number
- JPS6478030A JPS6478030A JP23541887A JP23541887A JPS6478030A JP S6478030 A JPS6478030 A JP S6478030A JP 23541887 A JP23541887 A JP 23541887A JP 23541887 A JP23541887 A JP 23541887A JP S6478030 A JPS6478030 A JP S6478030A
- Authority
- JP
- Japan
- Prior art keywords
- input
- integration period
- voltage
- size
- control circuit
- 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
- 230000010354 integration Effects 0.000 abstract 5
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To increase conversion speed by shortening the integration period of an input voltage and that of a reference voltage by changing the number of count of a clock to decide an input integration period corresponding to the size of an input analog voltage. CONSTITUTION:A detection circuit 4 to detect the size of the input voltage Vx is constituted of comparators 5-7 which compare the reference voltages V1-V3 with the input voltage Vx, an encoder 8 which encodes the output results of those comparators, and a counter control circuit 9 which controls the input integration period of an integral type A/D converter 10 by the output of the encoder 8. And the control circuit 13 of the integral type A/D converter 10 is controlled by the output of the counter control circuit 9, and the input integration period is changed by changing the number of clocks to be counted. Thus, since the titled circuit is constituted in such a way that the input integration period, that is, the maximum number of clocks is changed and set by the size of the input voltage, it is possible to shorten a time to perform digital conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23541887A JPS6478030A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23541887A JPS6478030A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6478030A true JPS6478030A (en) | 1989-03-23 |
Family
ID=16985805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23541887A Pending JPS6478030A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6478030A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128676A (en) * | 1990-06-05 | 1992-07-07 | Blh Electronics, Inc. | Variable conversion rate analog-to-digital converter |
| US6949903B2 (en) | 2001-12-22 | 2005-09-27 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Method and apparatus for digitizing a voltage |
-
1987
- 1987-09-18 JP JP23541887A patent/JPS6478030A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128676A (en) * | 1990-06-05 | 1992-07-07 | Blh Electronics, Inc. | Variable conversion rate analog-to-digital converter |
| US6949903B2 (en) | 2001-12-22 | 2005-09-27 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Method and apparatus for digitizing a voltage |
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