System and method for refreshing memory devices
US6269039A · kind A · utility
11Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2000 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Apr 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/406
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A volatile memory device, in accordance with the present invention, includes an array of memory cells with at least two dummy cells disposed within the memory array. A driver is included for writing a first state to one of the at least two dummy cells and for writing a second state to another one of the at least two dummy cells. A comparison circuit compares the first state and the second state to a threshold to determine if a refresh of the array of memory cells is needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.