Content addressable memory of a simple construction capable of retrieving a variable word length data
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United States of America Patent
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Jul 28, 1998
Grant Date -
N/A
app pub date -
Sep 3, 1996
filing date -
Aug 31, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A content addressable memory system includes one retrieval sense amplifier provided in common with a plurality of memory words. A logic operation between a result of retrieval outputted from the sense amplifier and the result of a preceding retrieval stored in a one-bit working register provided for the same sense amplifier is carried out by a control gate also provided for the same sense amplifier, and the result of the logic operation is stored back in the same working register. A plurality of working registers may be provided for each control gate and sense amplifier. The content addressable memory system can retrieve a variable word length data and can be realized with a reduced circuit area.
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