Patent ID: 8693273
Filing Date: 2014-04-08
Classification: G11C

Abstract:
1. A sense amplifier for reading a magnetic random access memory, comprising: a) a data cell capable of producing a data current proportional to data stored in said data cell; b) a first two reference cells connected to a first sense amplifier capable of producing a first reference from an averaged current of the first two reference cells, wherein the averaged reference current of the first sense amplifier is formed by coupling together the current paths of the reference cells coupled to the first sense amplifier; c) a second two reference cells connected to a second sense amplifier capable of producing a second reference from an averaged reference current of the of the second two reference cells, wherein the averaged reference current of the second sense amplifier is formed by coupling together the current paths of the reference cells of the second sense amplifier; d) said first reference capable of being averaged with said second reference by coupling together a node of the reference current paths of the first and second sense amplifiers; and e) said averaged first and second reference capable of being compared to the data current from a magnetic memory data cell to determine a logical value stored in said data cell.