Tv sync pulse separator and noise gate

Details Tv sync pulse separator and noise gate Tv sync pulse separator and noise gate

H - Electricity

04

N

350/85

H04N 5/08 (2006.01)

Patent

CA 1090466

IMPROVED TV SYNC PULSE SEPARATOR AND NOISE GATE Abstract Of The Disclosure A constant current source supplies a bias current through a diode chain, establishing a first voltage at a terminal coupled to the string. A DC restorer circuit, responsive to a source of composite video signals, couples an additional current through the diode chain during the sync interval. This additional current establishes a second voltage level at the terminal. The second voltage is compared with a reference voltage for producing output signals synchronized with the sync pulses. - 1 -

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