Patent ID: 7782661

Claim:
A spin-torque MRAM cell array comprising: a plurality of spin-torque MRAM cells arranged in rows and columns, each spin-torque MRAM cell comprising: a magnetic tunnel junction element, and a select switching device having a drain terminal connected to a first terminal of the magnetic tunnel junction element; a plurality of local word lines, each local word line associated with one row of the plurality of spin-torque MRAM cells and connected to a gate terminal of the select switching device of each spin-torque MRAM cell on each row to control activation and deactivation of the select switching device; and a plurality of gate voltage boosting circuits, each gate voltage boosting circuit placed between an associated global word line of a plurality of global word lines and an associated local word line of the plurality of local word lines to boost a local word line voltage applied to a gate of the select switching device of the selected spin-torque MRAM cell during writing of a first level to the magnetic tunnel junction element of a selected spin-torque MRAM cell when activated by a local word line control signal wherein a gate capacitance of the select switching devices of unselected spin-torque MRAM cells sharing a local word line function as boost capacitors to provide a boost voltage for the gate boosting circuit.