Patent ID: 11881259
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A method of driving a neuromorphic device comprising an electrode, a plurality of unit weighting elements having different resistance values, each of the plurality of unit weighing elements comprising a free layer arranged on the top of the electrode, a tunnel barrier layer arranged on the top of the free layer, and a fixed layer arranged on the top of the tunnel barrier layer, and corresponding to each bit of a synapse weight, and a plurality of control electrodes, a control voltage being applied between the free layer and the fixed layer of each of the plurality of unit weighting elements through each of the plurality of control electrodes, the method comprising:
applying write current to the electrode;
applying the control voltage to at least one selected from among the plurality of control electrodes and thus changing a value of switching threshold current of the unit weight element; and
changing a magnetization direction of the free layer of the unit weighting element, a value of whose switching threshold current is changed due to the write current and thus storing the synapse weight.