Title: Data word start detector

Abstract: In the disclosed detector, data is passed into two channels. In one channel successive interword pulses are gated out and the resulting pulses stretched at least one-half pulse width. In the second channel pulses representing the entire data word stretched so that the interword pulses overlap. After the data words are suitably synchronized to equalize the stretching delays, an exclusive OR gate compares the channel outputs to produce a step representing the interword interval. The step opens a counter which counts a predetermined number of clock pulses to define the beginning of the next word. A delay at the beginning of the channels eliminates any lead between the data and the corresponding clock pulses.

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Inventors: Schmid, Anton (Munich, DT)

Application Number: 578751
Filing Date: 1975-05-19
Publication_date: 1976-12-07
Assignee: Messerschmitt-Bolkow-Blohm GmbH (Munich, DT)
Primary Class(es): 327/25 327/141, 327/261, 327/284, 375/369
Other Classes:
US Patent Ref:

3310751	Mar, 1967	Atzenbeck	328/37.
3505594	Apr, 1970	Tarczy-Hornoch et al.	328/129.
3579126	May, 1971	Paul	328/129.
3611159	Oct, 1971	Florsheim et al.	328/129.

Other Refs:
Primary Examiner: Heyman, John S.
Assistant Examiner:
Attorney: Toren, McGeady and Stanger