Phase-locked loop circuit having phase lock detection...

Details Phase-locked loop circuit having phase lock detection... Phase-locked loop circuit having phase lock detection...

2006-10-03

2006-10-03

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000

Reexamination Certificate

active

07116145

ABSTRACT:
A phase-locked loop circuit including a lock detection function is disclosed. The phase-locked loop circuit comprises a lock detection circuit. The lock detection circuit includes a lock-detection-start-signal generator, a lock-detection-clock generator, and a lock-detection-signal generator. The lock-detection-start-signal generates a lock detection start signal when the pulse width of an up signal and a down signal reaches a predetermined value. The lock-detection-clock generator generates a lock detection clock signal on the basis of the up signal and the down signal. The lock-detection-signal generator counts the lock detection clock signal, and generates the lock detection signal. The phase-locked loop circuit is capable of discriminating the operating regions thereof and outputting a lock detection signal when the locking of phase is completed.

REFERENCES:
patent: 5978427 (1999-11-01), Kuhara
patent: 6005425 (1999-12-01), Cho
patent: 6714083 (2004-03-01), Ishibashi
patent: 6744838 (2004-06-01), Dixit
patent: 6757349 (2004-06-01), Katayama et al.
patent: 2002/0171296 (2002-11-01), Ishibashi
patent: 10-70457 (1998-03-01), None
patent: 02-344312 (2002-11-01), None

Affiliated with

Also associated with

Rating

Phase-locked loop circuit having phase lock detection... 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-locked loop circuit having phase lock detection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-locked loop circuit having phase lock detection... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3713654