Dram CAM cell with hidden refresh
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United States of America Patent
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Aug 6, 2002
Grant Date -
Jun 6, 2002
app pub date -
Dec 6, 2000
filing date -
Dec 6, 2000
priority date (Note) -
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Abstract
A Dynamic Content Addressable Memory (DCAM) cell topology that contains fewer that can perform a 'hidden' refresh of stored data that does not delay nor interrupt the CAM search cycle, thereby providing SCAM-like performance. A non-destructive read operation, is performed such that the stored-data does not have to be written back because of a refresh-read operation. A reliable CAM search can be performed after a read operation and before or even while the refresh-data is being written back. Soft-error detection processes can be performed on each CAM entry during the pendency of the refresh cycle. The DCAM cell can be used in a digital system such as a digital computer and a Network Router.
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