Stuff synchronization circuit

Details Stuff synchronization circuit Stuff synchronization circuit

1987-12-01

1990-04-24

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

370102, 375118, H04L 700

Patent

active

049205471

ABSTRACT:
A stuff synchronization circuit includes a memory, a phase comparison D flip-flop, a stuff judgment flip-flop, and a control section including selectors and an encoder. In the memory, writing and reading are performed at different timings. The phase comparison D flip-flop detects a phase difference between a write timing for a specific bit included in data input to the memory and a read timing for the specific bit. The stuff judgment D flip-flop judges an insertion timing of stuff pulses on the basis of the detected phase difference. The control section keeps a time interval between a time at which the phase difference is detected by the phase comparison D flip-flop and a time at which the insertion timing of stuff pulses is judged by the stuff judgment D flip-flop constant.

REFERENCES:
patent: 3961136 (1976-06-01), Cohen et al.
patent: 4072826 (1978-02-01), Aveneau
patent: 4147895 (1979-04-01), Fenoglio
patent: 4347620 (1982-08-01), Black et al.
patent: 4397017 (1983-08-01), Rokugo

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