Patent ID: 8711608

Claim:
A memory unit comprising: a giant magnetoresistance cell electrically coupled between a write bit line and a write source line, a write current passing through the giant magnetoresistance cell switches the giant magnetoresistance cell between a high resistance state and a low resistance state; and a magnetic tunnel junction data cell electrically coupled between a read bit line and a read source line, the magnetic tunnel junction data cell is configured to switch between a high resistance state and a low resistance state by magnetostatic coupling with the giant magnetoresistance cell, and be read by a read current passing through the magnetic tunnel junction data cell; wherein the read bit line and the write bit line is separately addressable and the read source line is separately addressable from the write source line and a write transistor is electrically coupled between the write source line and the giant magnetoresistance cell, and a read transistor is electrically coupled between the read source line and the magnetic tunnel junction data cell; and the giant magnetoresistance cell is spaced apart from the magnetic tunnel junction data cell a distance sufficient to prevent magnetostatic coupling between the giant magnetoresistance cell and the magnetic tunnel junction data cell, and the memory unit further comprises bridge of magnetic dots at least partially extending between the giant magnetoresistance cell and the magnetic tunnel junction data cell that provides magnetostatic coupling between the giant magnetoresistance cell and the magnetic tunnel junction data cell.