JPS5489556A - Stabilizing circuit of analog to digital converter - Google Patents
Stabilizing circuit of analog to digital converterInfo
- Publication number
- JPS5489556A JPS5489556A JP15988977A JP15988977A JPS5489556A JP S5489556 A JPS5489556 A JP S5489556A JP 15988977 A JP15988977 A JP 15988977A JP 15988977 A JP15988977 A JP 15988977A JP S5489556 A JPS5489556 A JP S5489556A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- signal
- level
- analog
- digital signal
- 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 prevent the malfunction due to level variation and noise in advance and to perform stable digital signal conversion at all times, by constituting the converter so that the operation of conversion can not be made if the analog input signal is not changed a given level or more.
CONSTITUTION: The circuit provides the A/D converter 11 converting the analog input signal X1 into digital signal, D/A converter 13 converting the digital signal into analog signal, level shift circuit 14 performing addition and subtraction of the output to a given finest increment and obtaining the upper and lower limits X+ and X-, and comparison circuit 15 comparing the level of the analog input signal Xi to the upper and lower limits X+ and X-. As the result of comparison, when reaching X1>X+ or Xi<X-, the output signal of the comparison circuit 15 operates the A/D converter 11 and the operation of the A/D converter 11 is stopped when X-<Xi< X+; this operation is provided with the control means by the command signal, resulating that the malfunction due to level variation or noise can be prevented in advance and stable digital signal conversion can always be made.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15988977A JPS5489556A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit of analog to digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15988977A JPS5489556A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit of analog to digital converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489556A true JPS5489556A (en) | 1979-07-16 |
Family
ID=15703382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15988977A Pending JPS5489556A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit of analog to digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489556A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6062242A (en) * | 1983-09-14 | 1985-04-10 | Tokyo Denshi Kogyo Kk | Analog and digital coupling circuit |
-
1977
- 1977-12-27 JP JP15988977A patent/JPS5489556A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6062242A (en) * | 1983-09-14 | 1985-04-10 | Tokyo Denshi Kogyo Kk | Analog and digital coupling circuit |
JPH0153937B2 (en) * | 1983-09-14 | 1989-11-16 | Tokyo Electronic Ind Co |
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