Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2004-12-15
2010-02-23
Ha, Dac V (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C375S376000, C327S147000, C327S156000
Reexamination Certificate
active
07668278
ABSTRACT:
An oscillator (30) supplies a high frequency signal (S) to a frequency divider (31). A phase comparator (32) produces a signal measuring phase difference between the divided frequency signal (QA) and a reference signal. A low-pass filter (34) controls the oscillator on the basis of the measurement signal. A measurement window, of duration defined by counting cycles of the high frequency signal, is generated in response to each active edge of the divided frequency signal. The measurement signal is activated during the measurement window so that it comprises, when an active edge of the reference signal falls within the window, a first pulse between the start of the window and this edge and a second pulse, opposite to the first, between this edge and the end of the window.
REFERENCES:
patent: 5157290 (1992-10-01), Crosby
patent: 5432481 (1995-07-01), Saito
patent: 5631587 (1997-05-01), Co et al.
patent: 5663688 (1997-09-01), Delmas et al.
patent: 6026134 (2000-02-01), Duffy et al.
patent: 6215363 (2001-04-01), Conta et al.
patent: 6259755 (2001-07-01), O'Sullivan et al.
patent: 6275072 (2001-08-01), Dally et al.
patent: 6337891 (2002-01-01), Kim
patent: 0 502 631 (1992-09-01), None
patent: 2 736 223 (1997-01-01), None
International Search Report, Appl. No. PCT/EP2004/014844 dated Mar. 8, 2005.
Aissa Sami
Robbe Michel
Eads Secure Networks
Ha Dac V
McCracken & Frank LLP
LandOfFree
Phase-locked loop 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-locked loop will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4156916