JPS5555623A - A/d converter - Google Patents
A/d converterInfo
- Publication number
- JPS5555623A JPS5555623A JP12894878A JP12894878A JPS5555623A JP S5555623 A JPS5555623 A JP S5555623A JP 12894878 A JP12894878 A JP 12894878A JP 12894878 A JP12894878 A JP 12894878A JP S5555623 A JPS5555623 A JP S5555623A
- Authority
- JP
- Japan
- Prior art keywords
- capacitors
- capacitor
- constitution
- turning
- switch
- 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 perform A/D conversion of high accuracy, by sufficiently small the capacitance ratio of two capacitors constituting the A/D converter.
CONSTITUTION: Two MOS capacitors C1 and C2 in different capacitance are provided with one end in common connection, and the capacitor C1 is charged with the input voltage V1 to be converted or reference input voltage VR by turning on the switch S1 or S2 of MOS transistors. Next, the charge of the capacitor C2 is discharged by turning on the switch S4 after redistributing the charges between the capacitors C1 and C2 by turning on the switch S3. Further, the terminal voltage VX of the capacitor C1 is inputted to one terminal of the comparator COM placed on the circuit and threshold voltage VT is inputted to another. With this constitution, the counter CT is driven while the comparator COM in VX≥VT, and the clock driving the switches S1 to S4 is counted as it is or in frequency division. With this constitution, the capacitance ratio α of two capacitors C1 and C2 is sufficiently taken small to increase the conversion accuracy and to make small the converter in size.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12894878A JPS5555623A (en) | 1978-10-19 | 1978-10-19 | A/d converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12894878A JPS5555623A (en) | 1978-10-19 | 1978-10-19 | A/d converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5555623A true JPS5555623A (en) | 1980-04-23 |
Family
ID=14997357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12894878A Pending JPS5555623A (en) | 1978-10-19 | 1978-10-19 | A/d converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5555623A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6318725A (en) * | 1985-08-13 | 1988-01-26 | ザ・バブコツク・アンド・ウイルコツクス・カンパニ− | Low level voltage-pulse converter |
-
1978
- 1978-10-19 JP JP12894878A patent/JPS5555623A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6318725A (en) * | 1985-08-13 | 1988-01-26 | ザ・バブコツク・アンド・ウイルコツクス・カンパニ− | Low level voltage-pulse converter |
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