发明名称 |
Non-volatile semiconductor memory device |
摘要 |
A non-volatile semiconductor memory device comprises a memory cell array including a plurality of memory cells arrayed capable of storing information in accordance with variations in threshold voltage. A likelihood calculator has a plurality of likelihood calculation algorithms for deriving a likelihood value about a stored data bit from a threshold value read out of the memory cell. An error correction unit executes error correction through iterative processing using the likelihood value obtained at the likelihood calculator. A likelihood calculator controller changes among the likelihood calculation algorithms in the likelihood calculator based on a certain value of the number of iterations in the iterative processing obtained from the error correction unit. |
申请公布号 |
US8078940(B2) |
申请公布日期 |
2011.12.13 |
申请号 |
US20070877287 |
申请日期 |
2007.10.23 |
申请人 |
UCHIKAWA HIRONORI;ISHIKAWA TATSUYUKI;HONMA MITSUAKI;KABUSHIKI KAISHA TOSHIBA |
发明人 |
UCHIKAWA HIRONORI;ISHIKAWA TATSUYUKI;HONMA MITSUAKI |
分类号 |
G11C29/00 |
主分类号 |
G11C29/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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