Low cost synchronizing signal separator

Details Low cost synchronizing signal separator Low cost synchronizing signal separator

1984-08-06

1986-07-15

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 328 63, 328111, 328139, 307234, H04N 510, H04N 508, H03K 522

Patent

active

046009442

ABSTRACT:
A sync signal separator includes a first monostable flip-flop, connected to be positive-edge triggered and nonretriggerable, with a first timing circuit for generating horizontal output pulses of slightly greater duration than input horizontal sync pulses, a second monostable flip-flop, connected to be negative-edge triggered and nonretriggerable, having a second timing circuit for generating a time duration greater than the normal duration of a vertical sync pulse and an OR gate having inputs coupled to receive input sync pulses and the output of the second monostable flip-flop for controlling the enable input of the second monostable flipflop. The output of the first monostable flipflop produces the horizontal output pulses and the output of the second monostable flipflop produces the vertical output pulses.

REFERENCES:
patent: 3996586 (1976-12-01), Dillon et al.
patent: 4370617 (1983-01-01), Brandt

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