Patent ID: 8040716

Claim:
A method of controlling the voltage of a sub-wordline in a variable resistive memory device, comprising: switchably passing a voltage from a main wordline to the sub-wordline; and substantially blocking forward current flow from the sub-wordline to a variable resistive memory cell of the device, wherein the variable resistive memory device is a random-access memory (RAM) device, the variable resistive RAM device comprising: a main wordline; a wordline connecting switch in signal communication with the main wordline; a sub-wordline in signal communication with the wordline connecting switch; a variable resistive memory cell having a variable resistance in signal communication with a first terminal of a switching element, a second terminal of the switching element disposed in signal communication with the sub-wordline; a sub-wordline pre-charging switch in signal communication with the sub-wordline; and a pre-charge voltage selector in signal communication with the sub-wordline pre-charging switch, the pre-charge voltage selector having a first selector switch in signal communication with a first voltage greater than a write voltage, and a second selector switch in signal communication with a second voltage less than the first voltage.