Method of and circuit for synchronizing data

Details Method of and circuit for synchronizing data Method of and circuit for synchronizing data

1990-05-18

1992-05-05

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

370101, 370102, 3701053, 375118, H04L 700

Patent

active

051114852

ABSTRACT:
Asynchronous DS-1 data is byte synchronized and converted to the SONET VT1.5 format by storing the DS-1 data in a store from which it is read in dependence upon a gapped clock signal which is produced by gapping a first gapped clock signal with a ratio of 208/193, which is the ratio of VT SPE bits per frame to DS-1 bits per frame. The first gapped clock signal is produced by gapping a VT1.5 synchronous clock signal. A frequency difference between the first gapped clock signal and the asynchronous data rate, multiplied in a frequency multiplier by the ratio of 208/193, is monitored by comparing the counts of modulo-208 counters, and, in dependence upon the monitored frequency difference, the gapping of the synchronous clock signal is controlled to achieve positive or negative stuffing and hence to compensate for the frequency difference.

REFERENCES:
patent: 3995119 (1976-11-01), Pachynski, Jr.
patent: 4791652 (1988-12-01), McEachern et al.
patent: 4811340 (1989-03-01), McEachern et al.
patent: 4920547 (1990-04-01), Murakami
patent: 4941156 (1990-07-01), Stern et al.
patent: 4996698 (1991-02-01), Nelson
patent: 5014271 (1991-05-01), Fujimoto et al.
patent: 5067126 (1991-11-01), Moore
W. Bartel et al., "Multiplexing of Plesiochronous Signals In A Digital Optical, Service-Integrated Subscriber Line System", Jun. 1985, IEEE International Conference on Communications 1985, vol. 1, pp. 165-170.
T. E. Moore et al., "Jitter Analysis for DS-3 To SONET Interface Circuit With Reduced Complexity", Jun. 1989, IEEE Pacific Rim Conference On Communications, Computers And Signal Processing, pp. 435-438.
Doowhan Choi, "Waiting Time Jitter Reduction", Nov. 1989, IEEE Transactions On Communications, vol. 37, No. 11, pp. 1231-1236.

Affiliated with

Also associated with

Rating

Method of and circuit for synchronizing data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of and circuit for synchronizing data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and circuit for synchronizing data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1419040