Timing recovery circuit for synchronous data transmission using

Details Timing recovery circuit for synchronous data transmission using Timing recovery circuit for synchronous data transmission using

1984-03-09

1986-07-08

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 85, 375 95, 375110, 307234, 307511, 328110, 329126, H04L 702, H04L 2718

Patent

active

045997357

ABSTRACT:
A timing recovery circuit for synchronous data transmission using a signal which, in the baseband, is formed by a succession of two-level signal elements, without overlap, and of duration T, able to take one of the four forms defined by the functions: ##EQU1## comprises a transition selection circuit. This circuit selects transitions in the received signal, in the baseband, separated from those which immediately precede them by a time-delay situated in an arbitrary range. This range brackets a symbol duration of between 3/4 and 5/4 times, exclusive, the duration of a signal element. A timebase which is synchronized on the transitions selected by the selection circuit delivers the signal element recovered timing.

REFERENCES:
patent: 3916324 (1975-10-01), Shuda
patent: 3968328 (1976-07-01), Tsuchiya et al.
patent: 4232197 (1980-11-01), Acampora et al.
patent: 4276650 (1981-06-01), de Jager et al.
patent: 4301417 (1981-11-01), Jansen et al.
patent: 4320525 (1982-03-01), Woodward
Patent Abstracts of Japan, vol. 2, No. 97, 8/15/78, p. 4787 E 78.
IEEE Transactions on Magnetics, vol. MAG-15, No. 6, Nov. 1979, pp. 1466 to 1467.
Nachrichtentechnische Zeitschrift, vol. 23, No. 1, Jan. 1970, pp. 11-16.

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