Invention Grant
- Patent Title: Cross-point variable resistance nonvolatile memory device
- Patent Title (中): 交叉点可变电阻非易失性存储器件
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Application No.: US14122714Application Date: 2013-03-27
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Publication No.: US09053788B2Publication Date: 2015-06-09
- Inventor: Ryotaro Azuma , Kazuhiko Shimakawa
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2012-077949 20120329
- International Application: PCT/JP2013/002068 WO 20130327
- International Announcement: WO2013/145733 WO 20131003
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C13/00

Abstract:
A cross-point memory device including memory cells each includes: a variable resistance element that reversibly changes at least between a low resistance state and a high resistance state; and a current steering element that has nonlinear current-voltage characteristics, and the cross-point memory device comprises a read circuit which includes: a reference voltage generation circuit which comprises at least the current steering element; a differential amplifier circuit which performs current amplification on an output voltage in the reference voltage generation circuit; a feedback controlled bit line voltage clamp circuit which sets the low voltage side reference voltage to increase with an output of the differential amplifier circuit; and a sense amplifier circuit which determines a resistance state of a selected memory cell according to an amount of current flowing through the selected memory cell.
Public/Granted literature
- US20140092671A1 CROSS-POINT VARIABLE RESISTANCE NONVOLATILE MEMORY DEVICE Public/Granted day:2014-04-03
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