Magnetic memory device, method for writing on the same and...

Static information storage and retrieval – Systems using particular element – Magnetoresistive

Reexamination Certificate

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C365S171000, C365S066000

Reexamination Certificate

active

06930911

ABSTRACT:
Each memory cell is constituted by a pair of magnetic memory elements. The magnetic memory elements are connected at one ends to sense bit lines, and at the other ends to a sense word line through a pair of reverse current preventing diodes, respectively. A constant current circuit is disposed on the grounded side of the sense word line. The constant current circuit has a function of fixing a current flowing through the sense word line, and is constituted by a constant voltage generating diode, a transistor and a current limiting resistor.

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R. Scheuerlein, et al., ISSCC 2000 / Session 7 / TD: Emerging Memory & Device Technologies / Paper TA 7.2, pp. 128-129, “A 10ns Read and Write Non-Volatile Memory Array Using A Magnetic Tunnel Junction and FET Switch in Each Cell”, Feb. 8, 2000.
U.S. Appl. No. 10/669,561, filed Sep. 25, 2003, Ezaki et al.
U.S. Appl. No. 10/717,595, filed Nov. 21, 2003, Ezaki et al.

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