Content addressable memory system and method of operation

Static information storage and retrieval – Associative memories – Ferroelectric cell

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Details

36518905, 36523008, 365233, G11C 1500

Patent

active

053595645

ABSTRACT:
A content addressable memory system has a plurality of associated circuit sets (12). Each circuit set has a tag memory element, a latching circuit and a data memory element. Each tag memory element stores a received tag in a first mode of operation and compares a received data tag to a stored data tag in a second mode of operation. In the second mode of operation, the tag memory element couples a first voltage supply terminal to an associated node in response to the comparison. Each latching circuit latches the voltage level present on its associated node during a first phase of a control signal. Each data memory element stores a data word and outputs the data word responsive to the latched voltage level of the associated latching circuit. The latching circuit continues to latch the voltage level and the data memory element continues to output its data word for an entire clock cycle. Each latching circuit couples its associated node to a second voltage supply terminal during a first phase of the control signal.

REFERENCES:
patent: 5130947 (1992-07-01), Reed
patent: 5249282 (1993-09-01), Sergers

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