Match sensing circuit for a content addressable memory device

Details Match sensing circuit for a content addressable memory device Match sensing circuit for a content addressable memory device

2008-05-13

2008-05-13

Phung, Anh (Department: 2824)

Static information storage and retrieval

Associative memories

Ferroelectric cell

C365S185200, C711S101000, C711S108000

Reexamination Certificate

active

11279903

ABSTRACT:
A Content Addressable Memory (CAM) device with an improved match sensing circuit is provided. The CAM is provided with a dummy cell and a respective dummy match line, as well as a reference dummy match line. The dummy match line is designed to be evaluated after all other cell match lines. The reference dummy match line triggers a dummy sensing block to initiate a time window for sensing the dummy match line. By this time, all other array match lines will have been stabilized and have reached their respective sensing blocks, to then allow the data to be latched. The match sensing circuit provided may be applied to a variety of arrangements including BCAMs and TCAMs.

REFERENCES:
patent: 6307798 (2001-10-01), Ahmed et al.
patent: 6442054 (2002-08-01), Evans et al.
patent: 6744653 (2004-06-01), Huang
patent: 2003/0123269 (2003-07-01), Gillingham et al.
patent: 2003/0161194 (2003-08-01), Ma et al.

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