Pulse or digital communications – Cable systems and components
Reexamination Certificate
2007-10-09
2007-10-09
Phu, Phuong (Department: 2611)
Pulse or digital communications
Cable systems and components
C375S354000, C307S100000, C333S033000, C333S125000
Reexamination Certificate
active
10696225
ABSTRACT:
A signal edge detector circuit is described for the detecting the signal transitions in a stream of microwave signals at a predetermined clock signal rate, particularly for OC-768 data streams. Selected transmission lines in the signal edge detector circuit reflect the signal transitions to terminate each signal transition at the output terminal of the detector circuit and to cancel out each other at a circuit node to prevent reflected transitions back to the input terminal of the detector circuit and to the transmission lines. With a squaring circuit at the output terminal of the detector circuit and a narrow-band filter at the output of the squaring circuit, the clock signals at the predetermined clock signal rate are recovered.
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Aka Chan LLP
Phu Phuong
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