Phase lock loop circuit and optical repeating apparatus,...

Details Phase lock loop circuit and optical repeating apparatus,... Phase lock loop circuit and optical repeating apparatus,...

2006-04-11

2006-04-11

Phan, Hanh (Department: 2633)

Optical communications

Optical repeater system

C398S175000, C398S176000, C398S177000, C398S202000, C398S209000, C398S154000, C398S155000, C375S376000, C375S375000, C327S156000, C327S157000, C331S00100A, C331S017000, C331S025000, C331S00100A

Reexamination Certificate

active

07027741

ABSTRACT:
According to a PLL circuit of the present invention, an output of a phase comparator is adjusted according to a space-to-mark transition-probability of an input signal so that an output of a voltage controlled oscillator has a predetermined frequency and phase. Therefore, even when a phase of a timing clock is set other than at0, an output of the PLL circuit can be kept at the set phase, irrespective of the space-to-mark transition-probability. By using the PLL circuit as such in an optical communication apparatus and an optical communication system, a discrimination point can be kept almost fixed, and therefore, it is possible to lower an error rate.

REFERENCES:
patent: 4069462 (1978-01-01), Dunn
patent: 4464771 (1984-08-01), Sorensen
patent: 4510461 (1985-04-01), Dickes et al.
patent: 5315270 (1994-05-01), Leonowich
patent: 5378937 (1995-01-01), Heidemann et al.
patent: 5963110 (1999-10-01), Ihara et al.
patent: 5987085 (1999-11-01), Anderson
patent: 6064236 (2000-05-01), Kuwata et al.
patent: 6072370 (2000-06-01), Nakamura
patent: 6337886 (2002-01-01), Asahi
patent: 6498670 (2002-12-01), Yamashita et al.
patent: 0 521 342 (1993-01-01), None
patent: 0 585 095 (1994-03-01), None
patent: 58-43632 (1983-03-01), None
patent: 64-11418 (1989-01-01), None
patent: 11-122066 (1999-04-01), None
patent: 11-122232 (1999-04-01), None
Patent Abstracts of Japan of JP 05-206895 dated Aug. 13, 1993.
Patent Abstracts of Japan of JP 06-188727 dated Jul. 8, 1994.

Affiliated with

Also associated with

Rating

Phase lock loop circuit and optical repeating apparatus,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase lock loop circuit and optical repeating apparatus,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase lock loop circuit and optical repeating apparatus,... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3593058