Read threshold determination using reference read threshold
US9069659B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Sep 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/5642
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-transitory computer readable medium that stores instructions for: reading a first group of flash memory cells using a reference read threshold to obtain multiple read results; processing the multiple read results by performing at least one out of calculating a distribution of values of the multiple read results and counting a number of read results of a certain value; estimating at least one actual read threshold to be used during future read attempts in response to at least one out of (i) the number of read results of the certain value and (ii) distribution information about a distribution of values of the read results; and reading a second group of flash memory cells using the at least one actual read threshold to provide actual read results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.