JPS5614378A - A/d converter - Google Patents
A/d converterInfo
- Publication number
- JPS5614378A JPS5614378A JP9006379A JP9006379A JPS5614378A JP S5614378 A JPS5614378 A JP S5614378A JP 9006379 A JP9006379 A JP 9006379A JP 9006379 A JP9006379 A JP 9006379A JP S5614378 A JPS5614378 A JP S5614378A
- Authority
- JP
- Japan
- Prior art keywords
- output
- input
- signal
- comparator
- 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
- Character Input (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE: To eliminate the defect of redundant fluctuation, by comparing preceding and current input signal levels in picture scanning with each other and by switching the fluctuation width of the white level, which becomes a reference, on a basis of the comparison result by the % unit of the input signal level.
CONSTITUTION: Analogue detection signal (1) from input end 1 is applied to A/D converter 2 and is converted to a digital signal with signal (2) output from D/A converter 6 as a reference potential. Detection signal (1) from this input end is input to one inputs of comparators 31 and 32, and signal (2) output from converter 6 is applied to the other input of comparator 31, and output 3 obtained by dividing output 2 of converter 6 by voltage divider 7 is applied to the other input of comparator 32. If detection signal (1)>output (2)o is true, the output of comparator 31 is sent to up/down counter 5 to increase the count value; and further, if output (2)>detection signal (1)>output (3) is ture, the inversion signal of the output of comparator 31 and the output of comparator 32 are applied to counter 5 through AND circuit 4 to reduce the count value, thus switching the input level by the % unit.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54090063A JPS5953593B2 (en) | 1979-07-16 | 1979-07-16 | A/D converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54090063A JPS5953593B2 (en) | 1979-07-16 | 1979-07-16 | A/D converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5614378A true JPS5614378A (en) | 1981-02-12 |
JPS5953593B2 JPS5953593B2 (en) | 1984-12-26 |
Family
ID=13988091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54090063A Expired JPS5953593B2 (en) | 1979-07-16 | 1979-07-16 | A/D converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5953593B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58101375A (en) * | 1981-12-10 | 1983-06-16 | Fujitsu Ltd | Initial value set system for white level follower |
JPS60163528A (en) * | 1984-02-06 | 1985-08-26 | Matsushita Electric Ind Co Ltd | Data waveform shaping circuit |
JPS6258982U (en) * | 1985-09-30 | 1987-04-11 |
-
1979
- 1979-07-16 JP JP54090063A patent/JPS5953593B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58101375A (en) * | 1981-12-10 | 1983-06-16 | Fujitsu Ltd | Initial value set system for white level follower |
JPH0232672B2 (en) * | 1981-12-10 | 1990-07-23 | Fujitsu Ltd | |
JPS60163528A (en) * | 1984-02-06 | 1985-08-26 | Matsushita Electric Ind Co Ltd | Data waveform shaping circuit |
JPS6258982U (en) * | 1985-09-30 | 1987-04-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS5953593B2 (en) | 1984-12-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55100741A (en) | Multi-input comparator | |
JPS57557A (en) | Voltage comparator | |
JPS5746573A (en) | Picture signal processing device | |
JPS5614378A (en) | A/d converter | |
KR950035459A (en) | Dual Input Analog-to-Digital Converter Using Single Converter Module | |
JPS5534704A (en) | Threshold setting circuit | |
JPS54964A (en) | Analog digital converter | |
JPS57186826A (en) | Analog-to-digital converter | |
JPS57201382A (en) | Digital television set | |
SU1034171A2 (en) | Analog/digital converter | |
JPS57152726A (en) | A/d converting circuit | |
JPS55128921A (en) | Waveform shaping circuit | |
JPS5725076A (en) | Method for binary-coding of video signal | |
JPS6417566A (en) | Image signal processing circuit | |
JPS5550737A (en) | Ad converter of sequential comparison type | |
JPS5516512A (en) | Coding circuit | |
JPS5715526A (en) | Signal detecting circuit | |
JPS6467081A (en) | Discriminating circuit for video signal form | |
JPH03256457A (en) | Digital signal separator circuit | |
JPS5574239A (en) | Analog/digital converter with check function in fail safe | |
JPS55130535A (en) | Exposure lamp control circuit of copying apparatus | |
JPS5577231A (en) | Analog-to-digital converter | |
JPS5718123A (en) | Analog-to-digital converter | |
JPS5689069A (en) | Calibrating system of comparator | |
KR920009093A (en) | Clamp level automatic adjustment circuit of A / D converter |