Static information storage and retrieval – Read/write circuit – Signals
Reexamination Certificate
2006-09-20
2008-09-30
Lam, David (Department: 2827)
Static information storage and retrieval
Read/write circuit
Signals
C365S233100, C365S230080, C365S222000
Reexamination Certificate
active
07430143
ABSTRACT:
A semiconductor memory device has a control circuit capable of properly controlling a delay locked loop in a variety of operational modes. The semiconductor memory device includes a clock buffer for externally receiving a system clock to output it as an internal clock, a delay locked loop unit for controlling a delay of the internal clock such that a data output timing is synchronized with the system clock; a data output buffer for synchronizing data with the delay locked internal clock, thereby outputting the data, and a clock buffer control unit, responsive to a previous operation state, for generating an enable signal controlling the on/off switching of the clock buffer.
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Hynix / Semiconductor Inc.
Lam David
McDermott Will & Emery LLP
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