Patent ID: 8724413
Filing Date: 2014-05-13
Classification: B82Y,G11C,H01L

Abstract:
1. A read circuit for reading memory elements of a memory cell comprising: the memory cell including a first magnetic memory element and a second magnetic memory element, the first magnetic memory element being coupled between a first access transistor and the second magnetic memory element, each of the first and second magnetic memory elements having associate therewith a resistance, the first and second magnetic memory elements including, a sense amplifier circuit coupled to the memory cell; and a reference circuit coupled to the sense amplifier, the reference circuit including a plurality of state reference circuits each of which includes a reference memory cell that has a reference magnetic memory element with a predetermined and distinctive resistance, the reference magnetic memory elements being used to read the magnetic memory elements of the memory cell by using the sense amplifier circuit to compare the resistance of the magnetic elements of the magnetic cell to that of the reference magnetic elements.