High storage capacity associative memory

Details High storage capacity associative memory High storage capacity associative memory

1983-06-07

1987-06-02

Fears, Terrell W.

Static information storage and retrieval

Associative memories

Ferroelectric cell

364200, G11C 1300

Patent

active

046708588

ABSTRACT:
An associative memory having a large storage capacity which also has the capability of being used as a conventional memory, i.e. accessed by physical location. A memory array (11) is accessed in conventional fashion by an address decoder (15). A mask/data drive circuit (13) controls the loading/reading of the memory array (11) when the device is in a conventional mode, and operates on the same pins to provide mask and search data when the drive is in the associative mode. In the associative mode, a plurality of match detect (17) circuits, one for each word location in memory (11), receive the output signals from the memory array (11). The match detect circuits (17) prioritize the output match signals from memory (11) and provide an output indicating the first or lowest word in memory (11) having a match. An address encoder (19) is responsive to the prioritized match output (if any) from the match detect circuits (17) to determine the physical location in memory (11) containing the matched word.

REFERENCES:
patent: 3221157 (1965-11-01), Fleisher et al.
patent: 3518631 (1970-06-01), Lindquist et al.
patent: 3685020 (1972-08-01), Meade
patent: 4219883 (1980-08-01), Kobayashi et al.

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