To provide a driving method capable of reducing a load to be received by a variable resistive element at a reset operation.
In an operation for increasing the resistance (resetting) of a variable resistance element having a variable resistor structured of a metal oxide, a voltage applied across both electrodes of the variable resistive element is made to monotonously increase from the minimum voltage amplitude to the maximum voltage amplitude while taking a longer rising period than a predetermined minimum transition time, when applying a reset voltage pulse. Thereafter, the voltage applied across both electrodes of the variable resistive element is maintained to be at the maximum voltage amplitude during a predetermined maximum voltage applying period. Thereby, even if the maximum voltage amplitude is higher than a voltage required for the resetting voltage of the variable resistive element, a resetting operation starts in the middle of the rising period so that excessive spike current flowing in an early stage of a reset voltage application is suppressed.
YAMAZAKI NOBUO
ONISHI JUNYA
TAMAI YUKIO
NAKANO TAKASHI
ISHIHARA KAZUYA
AWAYA NOBUYOSHI
| JP2010033676A | 2010-02-12 |
| US20080151601A1 | 2008-06-26 | |||
| US20100110778A1 | 2010-05-06 | |||
| US20080144356A1 | 2008-06-19 | |||
| US7986549B1 | 2011-07-26 |