Sync tip clamp circuitry

Details Sync tip clamp circuitry Sync tip clamp circuitry

H - Electricity

04

N

328/166, 350/83

H04N 1/36 (2006.01) H03K 5/003 (2006.01) H04N 5/04 (2006.01) H04N 5/18 (2006.01)

Patent

CA 2031082

RCA 84,953 Abstract of the Disclosure A clamp circuit includes a coupling capacitor connected between signal input and signal output terminals. A constant current sink and a controlled current source are connected to the output terminal. A comparator, coupled to the output terminal via a lowpass filter, generates signals for conditioning the controlled current source to source current whenever the output terminal exhibits a potential which differs from a predetermined reference in a predetermined polarity sense.

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