JPS5489557A - Stabilizing circuit for analog digital converter - Google Patents
Stabilizing circuit for analog digital converterInfo
- Publication number
- JPS5489557A JPS5489557A JP15989077A JP15989077A JPS5489557A JP S5489557 A JPS5489557 A JP S5489557A JP 15989077 A JP15989077 A JP 15989077A JP 15989077 A JP15989077 A JP 15989077A JP S5489557 A JPS5489557 A JP S5489557A
- Authority
- JP
- Japan
- Prior art keywords
- analog input
- input signal
- level
- digital converter
- 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
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To always perform stable digital signal conversion, by preventing the malfunction due to level variation or noise in advance through the constitution that if analog input signal does not change by a given level or more, the conversion operation is not performed.
CONSTITUTION: The sample hold circuit 12 sampling and holding the analog input signal Xi, level shift circuit 13 obtaining the upper and lower limits X+ and X- with the addition of a given increment, and comparison circuit 14 comparing the analog input signal Xi with the upper limit X+ and the lower limit X- for the level, are provided. As the result of comparison, if Xi>X+ or Xi<X-, the A/D converter 11 converts analog input signal into digital signal with the operation of the output of the comparison circuit 14 and it stops the converting operation, if X-< Xi<X+.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15989077A JPS5489557A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit for analog digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15989077A JPS5489557A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit for analog digital converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489557A true JPS5489557A (en) | 1979-07-16 |
Family
ID=15703405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15989077A Pending JPS5489557A (en) | 1977-12-27 | 1977-12-27 | Stabilizing circuit for analog digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489557A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56120219A (en) * | 1980-02-27 | 1981-09-21 | Matsushita Electric Ind Co Ltd | Analog and digital conversion system |
JP2006135436A (en) * | 2004-11-02 | 2006-05-25 | Fujitsu Ltd | Analog/digital conversion method and circuit thereof |
-
1977
- 1977-12-27 JP JP15989077A patent/JPS5489557A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56120219A (en) * | 1980-02-27 | 1981-09-21 | Matsushita Electric Ind Co Ltd | Analog and digital conversion system |
JPS6137811B2 (en) * | 1980-02-27 | 1986-08-26 | Matsushita Electric Ind Co Ltd | |
JP2006135436A (en) * | 2004-11-02 | 2006-05-25 | Fujitsu Ltd | Analog/digital conversion method and circuit thereof |
JP4647284B2 (en) * | 2004-11-02 | 2011-03-09 | 富士通セミコンダクター株式会社 | Analog / digital conversion method and analog / digital conversion circuit |
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