Apparatus for storing "Don't Care" in a content addressable memo

Static information storage and retrieval – Associative memories – Ferroelectric cell

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Details

36518901, 36518907, G11C 1500

Patent

active

053195906

ABSTRACT:
A content addressable memory cell is able to store a state representing "Don't Care", by storing two bits of data. The "Don't Care" state is indicated by storing two identical bits corresponding to a predetermined value, so that the cell indicates a match regardless of the match data. When the cell is not in the "Don't Care" state, two complementary bits are stored, so that the cell indicates a match only when the match data matches the state of the first of the two bits.

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