JPS6216995U

JPS6216995U -

Info

Publication number: JPS6216995U
Application number: JP1985108391U
Authority: JP
Priority date: 1985-07-15
Filing date: 1985-07-15
Publication date: 1987-01-31
Also published as: JPH0355996Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例のＲＧＢ信号入力
回路の回路図、第２図は従来のＲＧＢ信号入力回
路の回路図である。１…入力端子、２…入力信号レベル検出回路、
３…切換スイツチ、４…インピーダンス変換回路
、５…レベル変換回路。 FIG. 1 is a circuit diagram of an RGB signal input circuit according to an embodiment of this invention, and FIG. 2 is a circuit diagram of a conventional RGB signal input circuit. 1...Input terminal, 2...Input signal level detection circuit,
3... Selector switch, 4... Impedance conversion circuit, 5... Level conversion circuit.

Claims

[Scope of utility model registration request]

a level detection circuit that detects whether the level of the RGB signal inputted from the RGB input terminal is a TTL level or an analog level;
an impedance conversion circuit that converts the input impedance of the B input terminal to high impedance when the RGB signal is at the TTL level and to low impedance when the RGB signal is at the analog level; and a control signal output from the level detection circuit. Accordingly, when the RGB signal is at the TTL level, the RGB signal input from the RGB input terminal is output to the RGB signal processing circuit via the level conversion circuit, and when the RGB signal is at the analog level, the RGB signal is output directly to the RGB signal. RGB signal input circuit consisting of a changeover switch that outputs to the processing circuit.