Invention Grant
US09053756B2 Preservation circuit and methods to maintain values representing data in one or more layers of memory
有权
保存电路和保持在一层或多层存储器中表示数据的值的方法
- Patent Title: Preservation circuit and methods to maintain values representing data in one or more layers of memory
- Patent Title (中): 保存电路和保持在一层或多层存储器中表示数据的值的方法
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Application No.: US14068754Application Date: 2013-10-31
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Publication No.: US09053756B2Publication Date: 2015-06-09
- Inventor: Christophe Chevallier , Robert Norman
- Applicant: UNITY SEMICONDUCTOR CORPORATION
- Applicant Address: US CA Sunnyvale
- Assignee: Unity Semiconductor Corporation
- Current Assignee: Unity Semiconductor Corporation
- Current Assignee Address: US CA Sunnyvale
- Agency: Stolowitz Ford Cowger LLP
- Main IPC: G11C11/16
- IPC: G11C11/16 ; G11C5/00 ; G11C5/02

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.
Public/Granted literature
- US20140140123A1 PRESERVATION CIRCUIT AND METHODS TO MAINTAIN VALUES REPRESENTING DATA IN ONE OR MORE LAYERS OF MEMORY Public/Granted day:2014-05-22
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