Los beat detector

Details Los beat detector Los beat detector

2006-05-15

2009-08-25

Curs, Nathan M (Department: 2613)

Optical communications

Diagnostic testing

Fault detection

C398S155000, C375S215000, C375S376000

Reexamination Certificate

active

07580629

ABSTRACT:
A loss of signal beat detector makes use of multiplication of a local clock signal and a recovered clock signal to obtain frequency deltas used to indicate loss signal. Through a hardware implementation, a high speed detection is offered, allowing changeover from the recovered clocking signal to the local clock signal when loss of signal is detected to prevent the transmission of a timing transient to downstream nodes.

REFERENCES:
patent: 4012596 (1977-03-01), West et al.
patent: 7483638 (2009-01-01), Hayashi
patent: 2004/0162039 (2004-08-01), Marque-Pucheu
patent: 2005/0193301 (2005-09-01), Partovi et al.

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