Tracking cells for a memory system
US7237074B2 · kind B2 · utility
173Cited by
75References
79Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Oct 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/5621
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Tracking cells are used in a memory system to improve the read process. The tracking cells can provide an indication of the quality of the data and can be used as part of a data recovery operation if there is an error. The tracking cells provide a means to adjust the read parameters to optimum levels in order to reflect the current conditions of the memory system. Additionally, some memory systems that use multi-state memory cells will apply rotation data schemes to minimize wear. The rotation scheme can be encoded in the tracking cells based on the states of multiple tracking cells, which is decoded upon reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.