Adaptation of high-order read thresholds
US9779818B2 · kind B2 · utility
1Cited by
11References
24Claims
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Key dates
| Filing date | Jul 9, 2015 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Jul 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2029/0409
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes storing data in memory cells by programming the memory cells with respective values. The memory cells are read in multiple readout operations that each compares the programmed values to at least first and second read thresholds, while keeping the first read threshold fixed throughout the readout operations and perturbing only the second read threshold between the readout operations. A preferred value for the second read threshold is estimated based on the multiple readout operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.