Data communication system having improved synchronization capabi

Details Data communication system having improved synchronization capabi Data communication system having improved synchronization capabi

1995-07-20

1998-07-28

Pham, Chi H.

Pulse or digital communications

Synchronizers

375364, 375369, 370304, 370305, 370449, H04L 700, H04L 706, H04L 1310, H04L 1242

Patent

active

057871329

ABSTRACT:
A data receiving unit includes a data receiving circuit for receiving, through a transmission path, transmission data which has been encoded into a predetermined transmission code by using a predetermined transmission clock signal and includes a reference pulse having a pulse width corresponding to a period of the transmission clock signal, a clock for generating a received clock signal in synchronization with the transmission data, and a data decoding circuit for decoding the transmission data received by the data receiving circuit using the received clock signal generated by the clock, where the clock includes an oscillator generating at least a reference clock having a period which is shorter than that of the transmission clock signal, a counter circuit counting an interval between points of change of the transmission data received by the data receiving circuit according to the reference clock signal, a reference pulse detector circuit for detecting the reference pulse on the basis of a count value from the counter circuit, and a received clock signal generating circuit for generating a received clock signal in synchronization with the transmission data by frequency-dividing the reference clock signal on the basis of the count value when the counter circuit counts the pulse width of the reference pulse.

REFERENCES:
patent: 5268937 (1993-12-01), Marbot
patent: 5305316 (1994-04-01), Yoshida et al.
patent: 5357542 (1994-10-01), Suzuki
patent: 5493571 (1996-02-01), Engdahl et al.
patent: 5532692 (1996-07-01), Tatsuya
patent: 5546427 (1996-08-01), Shimada et al.

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