Non-volatile memory device, memory card and system, and method determining read voltage by comparing referenced program data with comparative read data
US8773922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2009 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Oct 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5634
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-volatile semiconductor memory device and related method of determining a read voltage are disclosed. The non-volatile semiconductor memory device includes; a memory cell array including a plurality of memory cells, a read voltage determination unit configured to determine an optimal read voltage by comparing reference data obtained during a program operation with comparative data obtained during a subsequent read operation and changing a current read voltage to a new read voltage based on a result of the comparison, and a read voltage generation unit configured to generate the new read voltage in response to a read voltage control signal provided by the read voltage determination unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.