JPS5591079A - A/d converter - Google Patents
A/d converterInfo
- Publication number
- JPS5591079A JPS5591079A JP16198878A JP16198878A JPS5591079A JP S5591079 A JPS5591079 A JP S5591079A JP 16198878 A JP16198878 A JP 16198878A JP 16198878 A JP16198878 A JP 16198878A JP S5591079 A JPS5591079 A JP S5591079A
- Authority
- JP
- Japan
- Prior art keywords
- output
- potential
- value
- counter
- converter
- 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.)
- Granted
Links
Landscapes
- Manipulation Of Pulses (AREA)
- Character Input (AREA)
Abstract
PURPOSE: To secure the simple decision for the reference potential under detection of characters by increasing the counter value when the input signal is higher than the 1st potential, decreasing the counter value when the input signal is at the middle value between the 1st and 2nd potential, and keeping the counter value when the input signal is lower than the 2nd potential respectively.
CONSTITUTION: Analog detection signal 1 detected through the photo detector is applied to comparators 31 and 32 each, and output 2 of D/A converter 6 is applied to the other input of comparator 31. At the same time, output 3 obtained by giving the voltage division to the output of converter 6 via voltage divider 7 is applied to comparator 32. Then the value of counter 5 is increased when the output of comparators 31 and 32 is higher than the 1st potential, and the counter value is decreased when the output is lower than the 2nd potential. And furthermore, the value of the counter is held in case the output features the middle value between the 1st and 2nd potential. Then the output of counter 5 is applied to converter 6, and the control is given to A/D converter 2 which converts the analog signal of input signal 1 into the digital signal via output 3 passed through divider 7. Thus the reference potential can be set in a simple way.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53161988A JPS5917476B2 (en) | 1978-12-29 | 1978-12-29 | A/D converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53161988A JPS5917476B2 (en) | 1978-12-29 | 1978-12-29 | A/D converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5591079A true JPS5591079A (en) | 1980-07-10 |
JPS5917476B2 JPS5917476B2 (en) | 1984-04-21 |
Family
ID=15745892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53161988A Expired JPS5917476B2 (en) | 1978-12-29 | 1978-12-29 | A/D converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5917476B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5878262A (en) * | 1981-11-04 | 1983-05-11 | Omron Tateisi Electronics Co | Defect detector |
JPS62104216A (en) * | 1985-08-12 | 1987-05-14 | シリコン・システムズ・インコ−ポレ−テツド | Method and apparatus for providing dynamic noise floor level |
-
1978
- 1978-12-29 JP JP53161988A patent/JPS5917476B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5878262A (en) * | 1981-11-04 | 1983-05-11 | Omron Tateisi Electronics Co | Defect detector |
JPH0346871B2 (en) * | 1981-11-04 | 1991-07-17 | Omuron Kk | |
JPS62104216A (en) * | 1985-08-12 | 1987-05-14 | シリコン・システムズ・インコ−ポレ−テツド | Method and apparatus for providing dynamic noise floor level |
Also Published As
Publication number | Publication date |
---|---|
JPS5917476B2 (en) | 1984-04-21 |
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