Patent ID: 8116122
Filing Date: 2012-02-14
Classification: G11C,Y10S

Abstract:
1. A method of self-reference reading a spin-transfer torque memory unit, comprising: applying a first read current through a magnetic tunnel junction data cell and forming a first bit line read voltage, the magnetic tunnel junction data cell having a first resistance state; storing the first bit line read voltage in a first voltage storage device; applying a low resistance state polarized write current through the magnetic tunnel junction data cell, forming a low second resistance state magnetic tunnel junction data cell; applying a second read current through the low second resistance state magnetic tunnel junction data cell and forming a second bit line read voltage; storing the second bit line read voltage in a second voltage storage device; and comparing the first bit line read voltage with the second bit line read voltage to determine whether the first resistance state of the magnetic tunnel junction data cell was a high resistance state or low resistance state.