Patent · US Active

Dynamic random access memory (DRAM) row hammering mitigation

US12094515B2 · kind B2 · utility

0Cited by

0References

26Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Victor Van Der Veen · Leusden, NL
Pankaj Deshmukh · San Diego, US
Behnam Dashtipour · San Diego, US
David Hartley · Berlin, DE
Mosaddiq Saifuddin · San Diego, US

Key dates

Filing date	Aug 17, 2022
Grant date	Sep 17, 2024
Priority date	—
Expiry date	Feb 15, 2043

Classification

Technology area (CPC G)Physics
CPC primaryG11C2211/4065
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An effect known as “rowhammer” may be mitigated in a DRAM organized in sub-banks of two or more rows. Row activation commands directed to a sub-bank may be detected. The number of row activation commands occurring within a refresh window may be counted and compared with a threshold. When it is detected that the number of row activation commands within the refresh window exceeds the threshold, an additional refresh command may be provided to the DRAM.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.