Patent ID: 6445612
Filing Date: 2002-09-03
Classification: G11C

Abstract:
Magnetoresistive random access memory architecture comprising:at least one data column of memory cells connected to have information stored therein, each memory cell including at least one non-volatile magnotoresistive element programmable to one of a data-Rmax and a data-Rmin state, wherein each memory cell of said data column of memory cells includes a magnetic tunnel junction and a control transistor; and at least one reference column including at least one midpoint generator cell positioned adjacent the data column, the midpoint generator cell including at least a plurality of non-volatile magnetoresistive elements each being set to at least one of reference-Rmax and reference-Rmin and the plurality of non-volatile magnetoresistive elements being connected together to provide a total resistance corresponding to a midpoint resistance between said reference-Rmax and reference-Rmin.