Sync separator circuit

Details Sync separator circuit Sync separator circuit

1977-03-03

1978-06-27

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 508

Patent

active

040978966

ABSTRACT:
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.

REFERENCES:
patent: 3869568 (1975-03-01), Ueda et al.

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