JPS5694835A - A/d converter - Google Patents
A/d converterInfo
- Publication number
- JPS5694835A JPS5694835A JP17196379A JP17196379A JPS5694835A JP S5694835 A JPS5694835 A JP S5694835A JP 17196379 A JP17196379 A JP 17196379A JP 17196379 A JP17196379 A JP 17196379A JP S5694835 A JPS5694835 A JP S5694835A
- Authority
- JP
- Japan
- Prior art keywords
- output
- voltage
- input
- counter
- comparator
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/48—Servo-type converters
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To simplify the constitution of an A/D converter, by using the voltage of the charge storage element which is charged and discharged by the up-pulse and the down-pulse of an up-down counter respectively for the comparison voltage. CONSTITUTION:When the charging voltage B of the charge storage element 7 is lower than the voltage level of the analog input A at the time point t1, the output C of the comparator becomes a high level with the gate 8 turned on. Then the output of the pulse generator 10 is applied to the up-terminal of the up-down counter 13 as well as sent to the charging circuit 11 to charge the element 7. When the voltage B becomes equal to the input voltage at the time point t2, the output of the comparator 5 turns to a low level to discontinue the charging. With reduction of the input A, the output of the comparator 6 becomes a high level. Thus the output of the generator 10 is applied to the down-terminal of the counter 13 as well as to the discharging circuit 12. Thus the element 7 is discharged. The digital value corresponding to the input A is obtained from the output of the counter 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17196379A JPS5694835A (en) | 1979-12-28 | 1979-12-28 | A/d converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17196379A JPS5694835A (en) | 1979-12-28 | 1979-12-28 | A/d converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5694835A true JPS5694835A (en) | 1981-07-31 |
Family
ID=15933002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17196379A Pending JPS5694835A (en) | 1979-12-28 | 1979-12-28 | A/d converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5694835A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60235064A (en) * | 1984-05-08 | 1985-11-21 | Matsushita Electric Ind Co Ltd | Apparatus for detecting number of rotations |
EP1528678A2 (en) * | 2003-10-30 | 2005-05-04 | Infineon Technologies AG | Comparator |
-
1979
- 1979-12-28 JP JP17196379A patent/JPS5694835A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60235064A (en) * | 1984-05-08 | 1985-11-21 | Matsushita Electric Ind Co Ltd | Apparatus for detecting number of rotations |
EP1528678A2 (en) * | 2003-10-30 | 2005-05-04 | Infineon Technologies AG | Comparator |
EP1528678A3 (en) * | 2003-10-30 | 2007-01-03 | Infineon Technologies AG | Comparator |
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