Content addressable memory and memory system

Details Content addressable memory and memory system Content addressable memory and memory system

2005-04-05

2005-04-05

Tran, M. (Department: 2818)

Static information storage and retrieval

Associative memories

Ferroelectric cell

C365S189070

Reexamination Certificate

active

06876560

ABSTRACT:
A content addressable memory which detects whether p (where p is an integer of 2 or more) bit sequences coincide respectively with reference bit sequences, said content addressable memory comprising: q comparison units which compares bit groups obtained by dividing the p bit sequences into q (where q is an integer of 2 or more) parts with corresponding bit groups in the reference bit sequences in p times; a precharge unit which precharges output lines of said q comparison units; and a comparison control unit responsive to a decision of noncoincidence in at least one of said q comparison units while said q comparison units are conducting an rth(where r is an integer variable that is 1 or more and that is at most p−1, and p is an integer of 2 or more) comparison operation, which stops precharging to be performed by said precharge unit at time of an (r+1)thcomparison operation and subsequent comparison operations.

REFERENCES:
patent: 6137707 (2000-10-01), Srinivasan et al.
patent: 6496398 (2002-12-01), Hellner et al.

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