Adaptive read voltage threshold calibration in non-volatile memory
US10699791B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2018 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Aug 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/3495
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-volatile memory includes a plurality of physical pages each assigned to one of a plurality of page groups. A controller of the non-volatile memory performs a first calibration read of a sample physical page of a page group of the non-volatile memory. The controller determines if an error metric observed for the first calibration read of the sample physical page satisfies a calibration threshold. The controller calibrates read voltage thresholds of the page group utilizing a first calibration technique based on a determination that the error metric satisfies the calibration threshold and calibrates read voltage thresholds of the page group utilizing a different second calibration technique based on a determination that the error metric does not satisfy the calibration threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.