Circuit for separating a composite stream of data and clock puls

Details Circuit for separating a composite stream of data and clock puls Circuit for separating a composite stream of data and clock puls

1977-08-25

1979-01-09

Brown, Thomas W.

Telegraphy

Systems

Printing

178 691, 3401461D, H04J 306, H04L 702

Patent

active

041339789

ABSTRACT:
A method and apparatus for generating separated data and clock pulse trains from a composite pulse train of interspersed data and clock pulses where a predetermined number of successive clock pulses are absent from predetermined segments of the composite pulse stream. In the preferred exemplary embodiment, the first encountered pulse in the composite pulse stream is passed to a separated clock pulse train. Pulses thereafter occurring during subsequent alternating periodic time intervals are passed to the data pulse stream and to the clock pulse stream, respectively. Absences or non-occurrences of clock pulses in the resultant separated clock pulse stream are detected and counted. After counting a predetermined number of non-occurrences clock pulses in the separated clock pulse stream, the circuit is reset and all of the above recited steps are repeated. An exemplary circuit utilizing a plurality of interconnected monostable multivibrators for accomplishing such data separation is disclosed.

REFERENCES:
patent: 3144515 (1964-08-01), Kaneko
patent: 3646451 (1972-02-01), Shoap
patent: 3733585 (1973-05-01), Merlo

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