JPS5563177A - Generator circuit for composite video signal - Google Patents
Generator circuit for composite video signalInfo
- Publication number
- JPS5563177A JPS5563177A JP13454878A JP13454878A JPS5563177A JP S5563177 A JPS5563177 A JP S5563177A JP 13454878 A JP13454878 A JP 13454878A JP 13454878 A JP13454878 A JP 13454878A JP S5563177 A JPS5563177 A JP S5563177A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- composite video
- transistor
- turned
- 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
- Digital Computer Display Output (AREA)
- Details Of Television Systems (AREA)
Abstract
PURPOSE: To obtain the composite video signal through the simple circuit suited for the IC formation by dividing the power voltage via the resistance circuit and then controlling the division ratio with the synchronous signal and the video signal.
CONSTITUTION: Resistances R1∼R4 are connected in series between DC power source E and the earth; open collector gate 110 is connected to the joint between R2 and R3; and furthermore open collector gate 120 is connected to the joint between R3 and R4. At the same time, the emitter follower circuit is formed with transistor Q1 and resistance RE to be operated as the buffer amplifier. Thus composite video signal CV is extracted from the joint between R1 and R2 and via the buffer amplifier. Gate 110 consists of transistor Tr1 and Tr2 is turned on with output Y fixed to the earth potential when input signal A features level 1. While Tr2 is turned off with Y turned floating when signal A is at level O. Thus gates 110 and 120 function as the electronic switches, and signal CV can be drawn out from the emitter of transistor Q1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13454878A JPS5563177A (en) | 1978-11-02 | 1978-11-02 | Generator circuit for composite video signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13454878A JPS5563177A (en) | 1978-11-02 | 1978-11-02 | Generator circuit for composite video signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5563177A true JPS5563177A (en) | 1980-05-13 |
Family
ID=15130883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13454878A Pending JPS5563177A (en) | 1978-11-02 | 1978-11-02 | Generator circuit for composite video signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5563177A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5670963A (en) * | 1979-11-16 | 1981-06-13 | Oki Electric Ind Co Ltd | Ink pump for multiple color inks of ink jet printer |
-
1978
- 1978-11-02 JP JP13454878A patent/JPS5563177A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5670963A (en) * | 1979-11-16 | 1981-06-13 | Oki Electric Ind Co Ltd | Ink pump for multiple color inks of ink jet printer |
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