Patent ID: 7877244

Claim:
A simulation circuit of magnetic tunnel junction (MTJ) element, used to simulate a toggle MTJ element, the MTJ element includes at least a synthetic anti-ferromagnetic free layer, a tunnel barrier layer, and a synthetic anti-ferromagnetic fixed layer, thus the variations of the electric resistance value is dependent on the parallel or anti-parallel alignment of the magnetic moments of two ferromagnetic layers adjacent to the tunnel barrier layer, the simulation circuit comprising: a conversion circuit, used to convert the magnetic field generated by the currents of write word/bit lines into an equivalent voltage; a state indication circuit, used to indicate the magnetic moment reversal state of the free layer; a write data storage circuit, used to indicate the data stored by the MTJ element; a magnetic moment configuration voltage calculation circuit, used to indicate the alignment relations of the magnetic moments of the two ferromagnetic layers adjacent to the tunnel barrier layer, when the MTJ element is in operation; and a characteristic simulation circuit, used to indicate the voltage vs current characteristic of the MTJ element.