Dual mode horizontal deflection circuit

Details Dual mode horizontal deflection circuit Dual mode horizontal deflection circuit

1981-02-11

1983-08-02

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

315364, 331 18, 331 20, H04N 504, H01J 2970

Patent

active

043969488

ABSTRACT:
A horizontal deflection turn-on circuit operates in the absence of trigger pulse normally derived by an AFPC loop. Under normal operation, the AFPC loop generates the trigger pulses based on a synchronized phase relationship with sampled flyback pulses. During receiver start-up, the flyback pulses are not present and no trigger pulses are generated. The turn on circuit provides auxiliary pulses which occur later in time than the normal occurrence of the trigger pulses. Means are provided for applying the auxiliary pulses to the horizontal deflection circuit only in the absence of normal trigger pulses.

REFERENCES:
patent: 3891892 (1975-06-01), Bohringer
patent: 3898525 (1975-08-01), Steckler
patent: 3936115 (1976-02-01), Dietz
patent: 4188568 (1980-02-01), Manners
patent: 4188641 (1980-02-01), Baker et al.
patent: 4292654 (1981-09-01), Steckler

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