JPS5563177A - Generator circuit for composite video signal - Google Patents

Generator circuit for composite video signal

Info

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
Application number
JP13454878A
Other languages
Japanese (ja)
Inventor
Masahiro Iwamura
Nobuo Sato
Fumiya Murata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13454878A priority Critical patent/JPS5563177A/en
Publication of JPS5563177A publication Critical patent/JPS5563177A/en
Pending legal-status Critical Current

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
JP13454878A 1978-11-02 1978-11-02 Generator circuit for composite video signal Pending JPS5563177A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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