US Patent 7113424 Energy adjusted write pulses in phase-change memories

A memory cell device that includes a plurality of phase-change memory cells, at least one write pulse generator, and at least one temperature sensor. The plurality of phase-change memory cells are each capable of defining at least two states. The write pulse generator generates a write pulse for the plurality of phase-change memory cells. The temperature sensor is capable of sensing temperature. The write pulse generator adjusts the write pulse for the plurality of phase-change memory cells with the temperature sensed by the temperature sensor.