发明授权
US08848426B2 Cross-point variable resistance nonvolatile memory device and reading method for cross-point variable resistance nonvolatile memory device
有权
交叉点可变电阻非易失性存储器件和交叉点可变电阻非易失性存储器件的读取方法
- 专利标题: Cross-point variable resistance nonvolatile memory device and reading method for cross-point variable resistance nonvolatile memory device
- 专利标题(中): 交叉点可变电阻非易失性存储器件和交叉点可变电阻非易失性存储器件的读取方法
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申请号: US14047214申请日: 2013-10-07
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公开(公告)号: US08848426B2公开(公告)日: 2014-09-30
- 发明人: Ryotaro Azuma , Kazuhiko Shimakawa
- 申请人: Panasonic Corporation
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: JP2012-226273 20121011
- 主分类号: G11C11/00
- IPC分类号: G11C11/00 ; G11C13/00
摘要:
A cross-point variable resistance nonvolatile memory device comprises: a memory cell array; a column decoder and pre-charge circuit which pre-charges a selected word line to a first voltage in a period P1 among the period P1, a period P2, and a period S that are included in this order in a read operation of a memory cell; a low decoder driver which pre-charges a selected word line to the first voltage in the periods P1 and P2 and sets the selected word line to a third voltage different from the first voltage in the period S; a feedback controlled bit line voltage clamp circuit which sets the selected bit line to a second voltage in the periods P2 and S; and a sense amplifier which determines the resistance state in a memory cell at a cross-point of the selected word line and the selected bit line in the period S.
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