JPS5544276A - Pulse detector of differential type - Google Patents
Pulse detector of differential typeInfo
- Publication number
- JPS5544276A JPS5544276A JP11775178A JP11775178A JPS5544276A JP S5544276 A JPS5544276 A JP S5544276A JP 11775178 A JP11775178 A JP 11775178A JP 11775178 A JP11775178 A JP 11775178A JP S5544276 A JPS5544276 A JP S5544276A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- signal
- resistors
- comparator
- voltage
- 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
- Television Systems (AREA)
Abstract
PURPOSE: To suitably pick up excellent binary signal pulse, by improving the effect of sag and level variation of video signal, by suitably selecting the charging and discharge time constant of the level detector.
CONSTITUTION: The video signal 1 at the terminal 2 is inputted to the + terminal of the comparator 5 with the voltage division at the first ratio with the resistors 3 and 4 and also given to the level detector 9 (consisting of resistor 6, FET 7, and capacitor 8). The charging time constant of the detector 9 is set sufficiently smaller than horizontal scanning period, and the discharge time constant is set sufficiently greater than horizontal ascanning period and smaller than the vertical blanking period. Sampling pulse is inputted to FET 7 from the signal source 15 to sample-hold the horizontal back porch of the video signal. This voltage is divided into the second ratio with the resistors 10 and 11 and given to the - side of the comparator 5. Further, the DC dreference voltage 15 is divided with the third ratio at the resistors 10 and 11 and superimposed on the - side to the slice reference level. With this constitution, the comparator 5 picks up the output signal slicing the + terminal signal with the reference voltage fed to the - terminal, from the terminal 13.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11775178A JPS5544276A (en) | 1978-09-25 | 1978-09-25 | Pulse detector of differential type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11775178A JPS5544276A (en) | 1978-09-25 | 1978-09-25 | Pulse detector of differential type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5544276A true JPS5544276A (en) | 1980-03-28 |
| JPS5753704B2 JPS5753704B2 (en) | 1982-11-15 |
Family
ID=14719408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11775178A Granted JPS5544276A (en) | 1978-09-25 | 1978-09-25 | Pulse detector of differential type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5544276A (en) |
-
1978
- 1978-09-25 JP JP11775178A patent/JPS5544276A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5753704B2 (en) | 1982-11-15 |
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