Content addressable memory system

Details Content addressable memory system Content addressable memory system

1995-06-02

1997-07-08

Dinh, Son T.

Static information storage and retrieval

Associative memories

Ferroelectric cell

36518907, G11C 1500

Patent

active

056468784

ABSTRACT:
A CAM system (2) stores a plurality of data sets in a plurality of pairs of CAM cells (4) and RAM cells (6). The portion of a particular data set stored in one of the RAM cells is accessed by inputting a tag to CAM cells that matches the portion of the data set stored in the CAM cell associated with the particular RAM cell. CAM system incorporates a novel two-stage matchline re-coding scheme to improve performance. Each of a plurality of first stage circuits (10) receives a plurality of matchline signals from a plurality of CAM sets and a plurality of data inputs from the corresponding RAM sets. Each output of the first stage circuits is further processed by a second stage circuit (12) which generates the final data output. The CAM system avoids the use of self-timed control signals and sense amplifiers.

REFERENCES:
patent: 4894799 (1990-01-01), Hanawa et al.
patent: 4928260 (1990-05-01), Chuang et al.
patent: 5299147 (1994-03-01), Holst

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