Patent ID: 7460389
Filing Date: 2008-12-02
Classification: G11C

Abstract:
1. A method of performing a write operation in a phase-change-material memory cell, the memory cell having a set phase and a reset phase associated therewith, the method comprising the steps of: monitoring a word-line associated with the memory cell; initiating performance of a write operation to the memory cell for the set phase, upon activation of the word-line; and performing a write operation to the memory cell for the reset phase when valid data for the reset phase is available; wherein the write operation to the memory cell for the set phase is performed by selectively connecting a bit line to a set current source via a set phase write driver, wherein the set phase write driver circuit is selectable via a set phase write control signal and the level of the set current source is controllable via mirroring from a set phase bias voltage source.