NON-VOLATILE REGISTER WITH MAGNETIC TUNNELING JUNCTIONS AND WITH EDGE DETECTOR FOR LOW READ DISTURB OF THE MTJS

摘要

A magnetic tunneling junction non-volatile register with feedback for robust read and write operations. In an embodiment, two MTJ devices (124; 126) are configured to store a logical 0 or a logical 1, and are coupled to drive an output node (132) to a voltage indicative of the stored logical 0 or a logical 1. The output of a D flipflop (104) is fed to the two MTJ devices so that the state of the D flip-flop may be stored in the two MTJ devices during a store operation. During a read operation, the D flip-flop outputs the state of the two MTJ devices. Read disturbances are mitigated with the use of an edge detector (134) coupled to the output node, so that a LOW voltage is provided to the D flip-flop if a rising voltage at the output node is detected.