Preservation circuit and methods to maintain values...

Details Preservation circuit and methods to maintain values... Preservation circuit and methods to maintain values...

2011-03-01

2011-03-01

Tran, Michael T (Department: 2827)

Static information storage and retrieval

Systems using particular element

Resistive

C365S226000

Reexamination Certificate

active

07898841

ABSTRACT:
Circuitry and methods for restoring data in memory are disclosed. The memory may include at least one layer of a non-volatile two-terminal cross-point array that includes a plurality of two-terminal memory elements that store data as a plurality of conductivity profiles and retain stored data in the absence of power. Over a period of time, logic values indicative of the stored data may drift such that if the logic values are not restored, the stored data may become corrupted. At least a portion of each memory may have data rewritten or restored by circuitry electrically coupled with the memory. Other circuitry may be used to determine a schedule for performing restore operations to the memory and the restore operations may be triggered by an internal or an external signal or event. The circuitry may be positioned in a logic layer and the memory may be fabricated over the logic layer.

REFERENCES:
patent: 6169688 (2001-01-01), Noguchi
patent: 7719876 (2010-05-01), Chevallier et al.
patent: 2008/0151669 (2008-06-01), Bill et al.

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