Video monitor with automatic switching between rf and...

Details Video monitor with automatic switching between rf and... Video monitor with automatic switching between rf and...

H - Electricity

04

N

350/81

H04N 5/21 (2006.01) H04N 5/44 (2006.01)

Patent

CA 1208772

ABSTRACT OF THE DISCLOSURE A video monitor having a common input terminal is selectively operable, automatically, from RF input signals or baseband video input signals. A high pass filter is provided at the input of an RF channel which includes RF amplifying means, detecting means and a video output. A low frequency coupling capacitor is provided at the input of a baseband video channel which also includes a video output. A video amplifier having a sync tip clamping circuit is AC coupled to both said channels. A peak detector and a transistor switch are coupled to the common input terminal for disabling the RF channel responsive to the input of a baseband video signal to minimize noise.

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