Content addressable memory device

Details Content addressable memory device Content addressable memory device

1998-09-08

1999-11-02

Hoang, Huan

Static information storage and retrieval

Associative memories

Ferroelectric cell

36518907, 36523003, G11C 1500

Patent

active

059782463

ABSTRACT:
It is an object of the invention provide a content addressable memory, which operates at high speed and consumes low electrical power. The first CAM cell array, which is supplied with higher m bits of reference data, is composed of m CAM cells connected in series for each word, compares previously stored data of m bits with higher m bits of reference data in bit serial for each word. The first sense amplifier detects the result of comparison. The second CAM cell array, which is supplied with lower n-m bits of the reference data, is composed of n-m CAM cells connected in parallel for each word, made to be in operating condition only in case that the output of the first sense amplifier shows coincidence, and compares previously stored data of n-m bits with lower n-m bits of the reference data in bit parallel for each word. The second sense amplifier detects the result of comparison.

REFERENCES:
patent: 5491703 (1996-02-01), Barnaby et al.
patent: 5592407 (1997-01-01), Konishi et al.
patent: 5642320 (1997-06-01), Jang

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