Apparatus and methods for refreshing memory
US10170174B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2017 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Oct 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/4065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatuses for executing row hammer refresh are described. An example apparatus includes: memory banks, each memory bank of the memory banks includes: a latch that stores a row address; and a time based sampling circuit. The time based sampling circuit includes: a sampling timing generator that provides a timing signal of sampling a row address; and a plurality of bank sampling circuits, wherein each bank sampling circuit of the bank sampling circuits is included in a corresponding memory bank of the memory banks and provides a sampling signal to the latch in the corresponding memory bank responsive to the timing signal of sampling the row address; and an interval measurement circuit that receives an oscillation signal, measures an interval of a row hammer refresh execution based on a cycle of the oscillation signal, and further provides a steal rate timing signal for adjusting a steal rate to the sampling timing generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.