Method of querying a four-transistor memory array as a...

Details Method of querying a four-transistor memory array as a... Method of querying a four-transistor memory array as a...

2002-01-31

2003-06-24

Tran, Andrew Q. (Department: 2824)

Static information storage and retrieval

Associative memories

Ferroelectric cell

C365S156000, C365S159000, C365S190000, C365S189070, C365S226000

Reexamination Certificate

active

06584002

ABSTRACT:

FIELD OF THE INVENTION
This invention relates generally to CMOS integrated circuits and more particularly to circuits for storing digital data.
SUMMARY OF THE INVENTION
A pair of cross-coupled inverters that hold a digital state are powered by supplies that also function as row select and column bit lines. A voltage differential between at least a first pair of supply lines and a second pair of supply lines may cause a current to flow into at least a third supply line depending upon the state of the cells. This current is sensed to determine whether the query matched the contents of the cells.


REFERENCES:
patent: 5726562 (1998-03-01), Mizuno
patent: 5856951 (1999-01-01), Arimoto et al.
patent: 5872737 (1999-02-01), Tsuruda et al.
patent: 6504741 (2003-01-01), Ema

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