Clock recovery circuit and method

Details Clock recovery circuit and method Clock recovery circuit and method

1981-03-30

1988-04-26

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

328155, 375118, H04L 702

Patent

active

047409983

ABSTRACT:
A circuit and method for digital recovery of a data clock from an NRZI coded data bit stream. A source clock pulse having a frequency which is an integer multiple of the data bit rate is used to clock a counter. An output of the counter is used as the source of the data clock. The counter is reset at each transition in the NRZI data stream, thereby resynchronizing the data clock with the data stream.

REFERENCES:
patent: 3290611 (1966-12-01), Horlacher et al.
patent: 3537013 (1970-10-01), Feldman
patent: 3668315 (1972-06-01), Heitzman
patent: 3745248 (1973-07-01), Gibson
patent: 3819853 (1974-06-01), Stein
patent: 4208724 (1980-06-01), Rattlingourd
patent: 4227251 (1980-10-01), Kazama et al.
patent: 4309662 (1982-01-01), Baudoux

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