Clamping circuit for a video signal

Details Clamping circuit for a video signal Clamping circuit for a video signal

1980-01-21

1981-10-20

Bookbinder, Marc E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 516

Patent

active

042964377

ABSTRACT:
A video clamping circuit comprising a differential amplifier the output of which is connected to the circuit output via a diode and is also fed-back to an amplifier input which is further connected to a reference voltage-carrying terminal via a resistor, the amplifier output being also connected to a capacitor charging circuit for charging a capacitor which is connected to the amplifier input for receiving a video signal. During charging of the capacitor the cut-off diode effects an effective signal separation between the input of the circuit and the output, it being ensured that last-mentioned output carries the constant reference voltage.

REFERENCES:
patent: 3927255 (1975-12-01), Yorkanis
patent: 3955047 (1976-05-01), Willis

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