Video monitor with automatic switching between RF and baseband v

Details Video monitor with automatic switching between RF and baseband v Video monitor with automatic switching between RF and baseband v

1983-03-07

1985-04-30

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358903, H04N 546

Patent

active

045147647

ABSTRACT:
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.

REFERENCES:
patent: 3869564 (1975-03-01), Colodny
patent: 4148070 (1979-04-01), Taylor

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