Pulse or digital communications – Receivers – Automatic baseline or threshold adjustment
Reexamination Certificate
2007-05-15
2007-05-15
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Automatic baseline or threshold adjustment
C375S346000
Reexamination Certificate
active
10097394
ABSTRACT:
According to a decision threshold voltage controlling method of feeding an optimum decision threshold voltage to a clock and data recovery circuit which converts an optical input signal into an electric signal, extracts a clock component from an input data signal amplified to a predetermined amplitude, and identifies 1 or 0 in the input data signal at a timing of the clock, three decision points are suitably controlled, by selectively performing a process of controlling the spaces of the three decision points, a process of moving the three decision points with their spaces kept as they are, and a process of changing an error pulse measurement time, depending on a measurement result of the error pulse.
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Inami Daijirou
Kuriyama Takashi
Matsumoto Yoshihiro
Shiraiwa Masaki
Fan Chieh M.
Foley & Lardner LLP
Nec Corporation
Perilla Jason M.
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