Read distribution management for phase change memory

摘要

Subject matter disclosed herein relates to a memory device, and more particularly to write performance of a phase change memory.

主权项

1. A method of reading a memory cell in a memory array, comprising:
providing a reference cell current delta for each of a plurality of current steps corresponding to a memory state of the memory cell, wherein the reference cell current delta is determined by comparing a current of a reference cell in the memory array at a point in time to a current of the reference cell at an earlier point in time; and determining the state of the memory cell based at least in part on a comparison between a memory cell current of the memory cell and a read reference current, the comparison being adjusted by the reference cell current delta associated with an applied current step.