Cancelation of cross-coupling interference among memory cells
US11513887B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2021 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Aug 23, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2029/0411
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory controller includes an interface and a processor. The interface communicates with memory cells that store data in predefined Programming Voltages (PVs). The processor is configured to produce observation samples that each includes (i) a target sample read from a target memory cell in a target Word Line (WL), and (ii) neighbor samples read from neighbor memory cells. Based on the observation samples, the processor is further configured to jointly estimate Cross-Coupling Coefficients (CCFs), by searching for CCFs that aim to minimize a predefined function of distances calculated between transformed observation samples that have been transformed using the CCFs and combinations of PVs that are closest to the respective transformed observation samples, to apply, based on the CCFs, cross-coupling cancelation to readout samples retrieved from the memory cells to produce enhanced readout samples, and to perform a storage operation related to reading data, using the enhanced readout samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.