Row hammer detection and avoidance
US11594273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2020 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Oct 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/408
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for detecting a row hammer in a memory comprising a plurality of memory cells arranged in a plurality of rows may include: a plurality of detection cells in a subject row of memory cells, the detection cells to be set to respective initial states and configured to transition to a state different from their initial states in response to activations of memory cells in an adjacent row of memory cells; a comparison circuit to compare current states of the detection cells with initial states of the detection cells and to determine whether any of the detection cells have a current state that is different from their corresponding initial states; and a trigger circuit to trigger a refresh of the memory cells in the subject row based on a detection of detection cells in the subject row having current states that are different from their corresponding initial states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.