Device for extracting a predetermined synchronizing signal from

Details Device for extracting a predetermined synchronizing signal from Device for extracting a predetermined synchronizing signal from

1974-06-12

1976-06-08

Morrison, Malcolm A.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 73S, 328139, H04L 700

Patent

active

039625400

ABSTRACT:
A synchronizing signal extracting device comprises means for detecting each pulse included in a composite synchronizing signal; means for generating a first pulse in synchronism with the detected pulse or detected pulse having a predetermined width; and means including a gate circuit to which the first pulse is supplied, and operative to open the gate circuit after lapse of a predetermined time period from the rise of the detected pulse and extract, as a synchronizing pulse constituting a synchronizing signal to be extracted, the first pulse passed through the gate circuit.

REFERENCES:
patent: 3550017 (1970-12-01), Whalen
patent: 3575215 (1971-04-01), Boddy
patent: 3629501 (1971-12-01), Cense
patent: 3671669 (1972-06-01), Abbott

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