发明授权
EP1476877B1 PROGRAMMABLE CONDUCTOR RANDOM ACCESS MEMORY AND METHOD FOR SENSING SAME
有权
随着对他的阅读可编程梯子和方式直接存取存储器
- 专利标题: PROGRAMMABLE CONDUCTOR RANDOM ACCESS MEMORY AND METHOD FOR SENSING SAME
- 专利标题(中): 随着对他的阅读可编程梯子和方式直接存取存储器
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申请号: EP03742713.5申请日: 2003-02-10
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公开(公告)号: EP1476877B1公开(公告)日: 2008-05-21
- 发明人: CASPER, Stephen, L. , DUESMAN, Kevin, G. , HUSH, Glen
- 申请人: Micron Technology, Inc.
- 申请人地址: 8000 South Federal Way Boise, ID 83707-0006 US
- 专利权人: Micron Technology, Inc.
- 当前专利权人: Micron Technology, Inc.
- 当前专利权人地址: 8000 South Federal Way Boise, ID 83707-0006 US
- 代理机构: Round, Edward Mark
- 优先权: US76486 20020219
- 国际公布: WO2003071549 20030828
- 主分类号: G11C11/34
- IPC分类号: G11C11/34 ; H01L45/00
摘要:
A sense circuit for reading a resistance level of a programmable conductor random access memory (PCRAM) cell is provided. A voltage potential difference is introduced across a PCRAM cell by activating an access transistor from a raised rowline voltage. Both a digit line and a digit complement reference line are precharged to a first predetermined voltage. The cell being sensed has the precharged voltage discharged through the resistance of the programmable conductor memory element of the PCRAM cell. A comparison is made of the voltage read at the digit line and at the reference conductor. If the voltage at the digit line is greater than the reference voltage, the cell is read as a high resistance value (e.g., logic HIGH); however, if the voltage measured at the digit line is lower than that of the reference voltage, the cell is read as a low resistance value (e.g., logic LOW).
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