System and method for adaptive multiple read of NAND flash
US10417087B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 2017 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Oct 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/1111
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for adaptive multiple read of NAND flash memory. A solid state drive may employ adaptive multiple-read to perform enhanced performance error correction using soft decisions without a performance penalty that otherwise might result from performing unnecessary reads. The soft decision error correcting algorithm may employ lookup tables containing log likelihood ratios. The method may include performing one or more read operations to obtain one or more raw data words for a code word, attempting to decode the code words using the one or more raw data words, and performing additional read operations when the decoding attempt fails. This process may be repeated until a decoding attempt succeeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.