Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2004-12-30
2008-09-23
Ha, Dac V (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C375S375000, C327S149000, C327S150000, C327S153000, C327S158000, C370S517000, C713S503000
Reexamination Certificate
active
07428286
ABSTRACT:
The present invention is directed to a duty cycle correction apparatus that can be implemented in a small size, and is capable of performing a phase lock more rapidly, and reducing the amount of current being consumed, and to a method thereof. The duty cycle correction apparatus in accordance with the present invention for use in a semiconductor memory device includes a delay line unit for delaying a first clock signal to produce a first delayed clock signal; an output tap unit for delaying the first delayed clock signal by a pulse width of a first logic state of the first clock signal under the control of a toss control signal derived from a second clock signal; and a phase mixer for mixing the clock signal from the output tap unit and one of the first and second clock signals.
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Ha Dac V
Hynix / Semiconductor Inc.
Townsend and Townsend / and Crew LLP
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