JPS6444177A - Pulse inserting circuit - Google Patents
Pulse inserting circuitInfo
- Publication number
- JPS6444177A JPS6444177A JP20125887A JP20125887A JPS6444177A JP S6444177 A JPS6444177 A JP S6444177A JP 20125887 A JP20125887 A JP 20125887A JP 20125887 A JP20125887 A JP 20125887A JP S6444177 A JPS6444177 A JP S6444177A
- Authority
- JP
- Japan
- Prior art keywords
- data pulse
- transistor
- video signal
- base
- inputting
- 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
- Studio Circuits (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To insert a data pulse without burying it even in any video signal level by inputting the data pulse and lowering the video signal level simultaneously. CONSTITUTION:A data inserting OR circuit si constituted of a first amplifier 1 and transistors Q3, Q4. A comparator is constituted of a differential transistor pair Q6, Q7 and a bias current source I4, a reference voltage is applied to the v base of the transistor Q6 and the data pulse is applied to the base of the transistor Q7. When the data pulse exceeds the reference voltage, the base voltage of the transistor Q3 is lowered. Accordingly, at the time of inputting the data pulse, a video signal is attenuated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20125887A JPS6444177A (en) | 1987-08-11 | 1987-08-11 | Pulse inserting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20125887A JPS6444177A (en) | 1987-08-11 | 1987-08-11 | Pulse inserting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444177A true JPS6444177A (en) | 1989-02-16 |
Family
ID=16437959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20125887A Pending JPS6444177A (en) | 1987-08-11 | 1987-08-11 | Pulse inserting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444177A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04356878A (en) * | 1990-11-30 | 1992-12-10 | Fuji Photo Film Co Ltd | Signal processor |
-
1987
- 1987-08-11 JP JP20125887A patent/JPS6444177A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04356878A (en) * | 1990-11-30 | 1992-12-10 | Fuji Photo Film Co Ltd | Signal processor |
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