Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Reexamination Certificate
2006-12-14
2008-10-28
Pascal, Robert J. (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
C331S00100A, C331S016000, C324S076520, C324S076770, C327S002000, C327S003000, C327S005000, C327S007000, C327S008000, C327S010000, C327S012000, C327S040000, C375S375000
Reexamination Certificate
active
07443251
ABSTRACT:
Disclosed are a digital phase-frequency detector and a method of operating a digital phase-frequency detector. The detector includes an input circuit, an output circuit and a reset circuit. In use, the input circuit receives first and second input signals during a plurality of cycles, and during a given one of the cycles, generates a first intermediate signal or a second intermediate signal depending on which of the first and second input signals was received first during that given one of said cycles. The output circuit receives these intermediate signals, and outputs, during said one cycle, a first output signal or a second output signal depending on which one of intermediate signals was received by the output circuit during said one cycle. The reset circuit applies a reset signal to the input circuit under defined conditions to begin a new one of said plurality of cycles.
REFERENCES:
patent: 4451794 (1984-05-01), Yamada
patent: 4751469 (1988-06-01), Nakagawa et al.
patent: 5142555 (1992-08-01), Whiteside
patent: 5942926 (1999-08-01), Yamaguchi
patent: 6633184 (2003-10-01), Idei et al.
patent: 7061276 (2006-06-01), Xu
patent: 2004/0114702 (2004-06-01), Friedman et al.
patent: 2005/0270893 (2005-12-01), Lin et al.
patent: 2006/0146972 (2006-07-01), Wang et al.
patent: 2006/0171495 (2006-08-01), Youssouflan
patent: 2006/0181353 (2006-08-01), Shigemori
patent: 2006/0202726 (2006-09-01), Lin et al.
Rylyakov Alexander V.
Tierno José A.
Gannon Levi
International Business Machines - Corporation
Pascal Robert J.
Scully , Scott, Murphy & Presser, P.C.
Zarick, Esq. Gail
LandOfFree
Digital phase and frequency detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital phase and frequency detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital phase and frequency detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3988912