Invention Grant
US07773022B2 Operating NAND cells using multiple levels for each data value
有权
对每个数据值使用多个级别的操作NAND单元
- Patent Title: Operating NAND cells using multiple levels for each data value
- Patent Title (中): 对每个数据值使用多个级别的操作NAND单元
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Application No.: US12371164Application Date: 2009-02-13
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Publication No.: US07773022B2Publication Date: 2010-08-10
- Inventor: Michael J. Cornwell , Christopher P. Dudte
- Applicant: Michael J. Cornwell , Christopher P. Dudte
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Fish & Richardson P.C.
- Main IPC: H03M1/12
- IPC: H03M1/12
Abstract:
A system and method, including computer software, for storing digital information uses multiple NAND flash memory cells. Each memory cell is adapted to receive charge during a write operation to an analog voltage that corresponds to a data value having a binary representation of more than 4 bits. An analog-to-digital converter converts the analog voltage from each memory cell into a digital representation of the analog voltage during a read operation of each cell.
Public/Granted literature
- US20090147570A1 USE OF 8-BIT OR HIGHER A/D FOR NAND CELL VALUE Public/Granted day:2009-06-11
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