Nonvolatile semiconductor storage device, controller and threshold adjustment method
US8385116B2 · kind B2 · utility
1Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5646
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A nonvolatile semiconductor storage device includes a plurality of cells for storing data on a basis of charges stored nonvolatilly, a write unit for writing and erasing data on the cell by injecting or extracting charges into or from the cell, a comparator for comparing the voltage produced by a selected cell to be read out with a threshold, a read unit for outputting read data on the basis of the comparison result by the comparator, and a threshold update unit for updating the threshold of the comparator according to the voltage produced by the selected cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.