Constant pulse width sync regenerator

Details Constant pulse width sync regenerator Constant pulse width sync regenerator

1976-06-28

1977-12-20

Safourek, Benedict V.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

328139, H04N 510

Patent

active

040645410

ABSTRACT:
A sync regenerator is provided which regenerates synchronizing information signals having a varying amplitude and width by comparing the sync signals in a comparator circuit to which a source of reference potential is applied. The comparator output signal of fixed amplitude is pulse width detected and the value of the detector output voltage is coupled by a feedback circuit to the reference potential source to vary the reference potential so as to maintain the width of the comparator output signal constant. The regenerated sync output signal is of constant amplitude and constant width.

REFERENCES:
patent: 3237110 (1966-02-01), Kaye
patent: 3699256 (1972-10-01), Roth
patent: 3805172 (1974-04-01), Barrot et al.
Electronic Design; vol. 20, No. 2, p. 100, Oct. 12, 1972; "Variable Threshold Circuit Separates Synch Pulses from Composite Video Signal".

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