Sample clock extracting circuit and baseband signal...

Details Sample clock extracting circuit and baseband signal... Sample clock extracting circuit and baseband signal...

2006-12-19

2006-12-19

Kumar, Pankaj (Department: 2611)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S354000, C375S365000

Reexamination Certificate

active

07151812

ABSTRACT:
A sample clock extracting circuit comprises including a number-of-change point memory, a number-of-change point updating circuit and an output clock phase determining circuit. The number-of-change point memory stores a number-of-change-point information set every N types of clock phases each having a frequency equivalent to N times a symbol transmission rate of an input baseband signal. The number-of-change point updating circuit updates the number-of-change point information stored in the number-of-change point memory about a clock phase related to timing thereof when a rising change point or a falling change point occurs in the baseband signal. The output clock phase determining circuit determines a clock phase directly or indirectly indicative of a sample clock phase for the baseband signal based on the number-of-change-point information stored in the number-of-change point memory.

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