KR940003393A

KR940003393A - CTV switching circuit

Info

Publication number: KR940003393A
Application number: KR1019920011841A
Authority: KR
Inventors: 도장환
Original assignee: 강진구; 삼성전자 주식회사
Priority date: 1992-07-03
Filing date: 1992-07-03
Publication date: 1994-02-21
Also published as: KR100189518B1

Abstract

미리 설정된 외부의 절환신호에 응답하여 서로 다른 주파수로 인가되는 제1,2,3방송 신호를 스위칭하기 위한 회로는 상기 절환신호의 인가상태에 따라 스위칭 신호를 인가하는 스위치부와, 상기 스위치부(100)에 연결되어 상기 제1,2,3 방송신호의 색신호를 각기 처리하는 위한 발진 주파수를 제공하는 발진기 및 상기 색신호를 라인 단위로 지연하기 위한 라인 지연기를 가지는 발진 및 지연부와, 상기 발진 및 지연부와 상기 절환신호 연결되어 상기 색신호를 처리하는 크로마처리IC와, 상기 스위치부와 상기 발진 및 지연부간에 연결되며, 상기 스위칭 신호에 응답하여 상기 크로마 처리부IC가 상기 제1,2,3 방송 신호에 따른 상기 색신호를 처리할 수 있도록 상기 발진기 및 상기 라인 지연기의 출력을 상기 크로마처리IC의 해당 단자로 각기 스위칭하는 스위칭IC로 구성되어 있다.The circuit for switching the first, second and third broadcast signals applied at different frequencies in response to a preset external switching signal includes a switch unit for applying a switching signal according to an application state of the switching signal, and the switch unit ( An oscillator and a delay unit connected to 100 and having an oscillator for providing an oscillation frequency for processing color signals of the first, second, and third broadcast signals, and a line delayer for delaying the color signals on a line-by-line basis; A chroma processing IC connected to a delay unit and the switching signal to process the color signal, and connected between the switch unit and the oscillation and delay unit, and the chroma processing unit IC is broadcasted in response to the switching signal. A switch for switching the outputs of the oscillator and the line delay to the corresponding terminals of the chroma processing IC so as to process the color signal according to the signal It consists of the IC.

Description

CTV switching circuit

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

제1도는 본발명에 따른 스위칭 회로도.1 is a switching circuit diagram according to the present invention.

Claims

In the circuit for switching the first, second, and third broadcast signals applied at different frequencies in response to a preset external switching signal, the switch unit 100 for applying a switching signal in accordance with the application state of the switching signal and An oscillator and an oscillator connected to the switch unit 100 having an oscillator for providing an oscillation frequency for processing color signals of the first, second, and third broadcast signals, and a line delayer for delaying the color signals on a line-by-line basis; And a chroma processing IC 300 connected to the oscillation and delay unit 250 and the switching signal to process the color signal, and connected between the switch unit 100 and the oscillation and delay unit 250. In response to the switching signal, the chroma processing unit IC 300 outputs the output of the oscillator and the line delay unit to the chroma processing IC so as to process the color signal according to the first, second and third broadcast signals. Circuits, characterized in that consisting of a switching IC (200) for switching to the corresponding terminal of (300), respectively.

The circuit of claim 1, wherein the first, second, and third broadcast signals are NTSC, PAL-N, and PAL-M signals.

The circuit of claim 1, wherein the switch unit (100) comprises first and second transistors that turn on or off according to the switching state.

※ Note: The disclosure is based on the initial application.