KR890017949A - TV / video signal automatic switching circuit - Google Patents

TV / video signal automatic switching circuit Download PDF

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Publication number
KR890017949A
KR890017949A KR1019880005697A KR880005697A KR890017949A KR 890017949 A KR890017949 A KR 890017949A KR 1019880005697 A KR1019880005697 A KR 1019880005697A KR 880005697 A KR880005697 A KR 880005697A KR 890017949 A KR890017949 A KR 890017949A
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KR
South Korea
Prior art keywords
video signal
control voltage
signal
horizontal synchronizing
output
Prior art date
Application number
KR1019880005697A
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Korean (ko)
Other versions
KR950010882B1 (en
Inventor
윤종렬
Original Assignee
안시환
삼성전자 주식회사
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Priority to KR1019880005697A priority Critical patent/KR950010882B1/en
Publication of KR890017949A publication Critical patent/KR890017949A/en
Application granted granted Critical
Publication of KR950010882B1 publication Critical patent/KR950010882B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Synchronizing For Television (AREA)

Abstract

내용 없음No content

Description

TV/비데오 신호 자동 절환회로TV / video signal automatic switching circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 본 발명의 블록도. 제 2 도는 본 발명의 수평 동기 분리 회로와 제어 전압 발생부의 일실시회로도.1 is a block diagram of the present invention. 2 is an exemplary circuit diagram of a horizontal synchronous separation circuit and a control voltage generator of the present invention.

Claims (3)

영상버퍼와 음성버퍼를 통하여 인가되는 외부 비데오신호와 내부 TV 신호를 절환시켜 주는 회로에 있어서, 외부 영상 신호중의 수평 동기 신호를 분리하는 수평 동기 분리수단과, 상기 수평 동기 분리수단의 동기분리 출력에 따라 제어전압을 다르게 발생시키는 제어전압 발생수단과, 상기 제어전압 발생수단의 제어 전압으로 스위칭 되어 외부 비데오 신호와 TV 신호를 선택해 주는 스위칭 집적소자(11)로 구성된 TV/비데오 신호 자동 절환회로.A circuit for switching an external video signal and an internal TV signal applied through a video buffer and an audio buffer, comprising: horizontal sync separating means for separating horizontal sync signals in an external video signal, and a sync separating output of the horizontal sync separating means; And a control voltage generating means for generating a control voltage differently, and a switching integrated device (11) for switching to a control voltage of the control voltage generating means and selecting an external video signal and a TV signal. 제 1 항에 있어서, 수평 동기 분리수단은 복합 영상 신호가 저항(R1-R3)과 콘덴서(C1)를 통하여 베이스에 인가되는 트랜지스터(Q1)의 콜렉터 측에서 수평 동기 신호가 분리되어 출력되게 구성한 TV/비데오 신호 자동 절환회로.2. The horizontal synchronizing separation means according to claim 1, wherein the horizontal synchronizing separation means separates the horizontal synchronizing signal from the collector side of the transistor Q 1 to which the composite image signal is applied to the base through the resistors R 1 -R 3 and the condenser C 1 . TV / video signal automatic switching circuit configured for output. 제 1 항에 있어서, 제어전압 발생수단은 수평 동기 분리회로(9)에서 분리된 수평 동기 신호가 저항(R5)과 콘덴서(C3)를 통하여 베이스에 인가되는 트랜지스터(Q2)의 콜렉터 출력이 다이오드(D1)와 저항(R7) 및 콘덴서(C4)를 통한후 트랜지스터(Q3)의 베이스에 인가되게 하여 트랜지스터(Q3)의 콜렉터 측으로 제어전압이 출력되게 구성한 TV/비데오 신호 자동 절환회로. 2. The collector output according to claim 1, wherein the control voltage generating means has a horizontal synchronizing signal separated by the horizontal synchronizing separation circuit (9) applied to the base via a resistor (R 5 ) and a capacitor (C 3 ). A TV / video signal configured to be applied to the base of transistor Q 3 through this diode D 1 , resistor R 7 and capacitor C 4 , and to output a control voltage to the collector side of transistor Q 3 . Automatic switching circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880005697A 1988-05-14 1988-05-14 Tv/video signal auto changing circuit KR950010882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880005697A KR950010882B1 (en) 1988-05-14 1988-05-14 Tv/video signal auto changing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880005697A KR950010882B1 (en) 1988-05-14 1988-05-14 Tv/video signal auto changing circuit

Publications (2)

Publication Number Publication Date
KR890017949A true KR890017949A (en) 1989-12-18
KR950010882B1 KR950010882B1 (en) 1995-09-25

Family

ID=19274399

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880005697A KR950010882B1 (en) 1988-05-14 1988-05-14 Tv/video signal auto changing circuit

Country Status (1)

Country Link
KR (1) KR950010882B1 (en)

Also Published As

Publication number Publication date
KR950010882B1 (en) 1995-09-25

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