Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2007-07-11
2011-12-06
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C375S327000, C375S371000, C375S376000
Reexamination Certificate
active
08073093
ABSTRACT:
Disclosed are a phase synchronous device for improving jitter of an output signal and a method for generating a phase synchronous signal. The phase synchronous device includes a phase detector detecting a phase difference between first and second signals to output a phase detection signal and a locking signal; a control signal generator adjusting a slope of the phase detection signal in response to the locking signal; and a charge pumping unit outputting a control voltage in response to an output of the control signal generator. The speed of a control signal applied to the charge pumping unit is adjusted in response to the locking signal, so that a peak current is reduced, and thus jitter of an output signal is improved by being reduced or minimized.
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Hynix / Semiconductor Inc.
Ladas & Parry LLP
Liu Shuwang
Tayong Helene
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