CAM match line precharge
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United States of America Patent
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Aug 8, 2000
Grant Date -
N/A
app pub date -
Aug 7, 1998
filing date -
Aug 7, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a method and system for improved CAM match line precharge, in which the amount of power consumed by match line precharge and discharge is significantly reduced. An independent match precharge voltage is introduced to the CAM, which is used to separately precharge the match line and is available for use by comparison circuits to attempt to match the input tag. The match precharge voltage is selected so as to reduce the relative power consumption for match line precharge and discharge by a factor of about five. Optionally, sense amplifiers in the comparison circuits are disposed so as to compare each discharged match line with the match precharge voltage itself.
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