Start bit detecting circuit

Details Start bit detecting circuit Start bit detecting circuit

1987-03-13

1988-05-31

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

370 48, H04L 2538

Patent

active

047486430

ABSTRACT:
A start bit detecting circuit is disclosed, which employs a waveform reshaper, a detection and start circuit and a decision circuit. The waveform reshaper has threshold values T+ and T-. The detection and start circuit starts the start bit detecting circuit upon detection of a predetermined pulse width. The decision circuit judges, for a plurality of decision points, coincidence between the input signal and a specific pattern having a start-signal element, which comprises a plurality of bits.

REFERENCES:
patent: 3396239 (1968-08-01), Yamauchi
patent: 3749840 (1973-07-01), Fornasiero et al.
patent: 4048440 (1977-09-01), Peck et al.
patent: 4318128 (1982-03-01), Sauvanet
patent: 4387465 (1983-06-01), Bocker
patent: 4540897 (1985-09-01), Takaoka
patent: 4598268 (1986-07-01), Perry

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