Patent ID: 8542527

Claim:
A magnetic memory cell, comprising: a Magnetic Tunnel Junction (MTJ) device including top and bottom electrodes, which are provided to allow current to flow therethrough, and a fixed layer and a free layer, which are magnetic layers respectively deposited on a top and a bottom of an insulating layer, required to insulate the top and bottom electrodes from each other; and a current control unit including a first current driving unit, one end of which is connected to the top electrode, a second current driving unit, one end of which is connected to the other end of the first current driving unit, a third current driving unit, one end of which is connected to the bottom electrode, and a fourth current driving unit, one end of which is connected to the other end of the third current driving unit, wherein the current control unit is directly connected to the top and bottom electrodes and changes the magnetization direction of the free layer by applying current in a direction crossing the top and bottom electrodes, wherein the current control unit is configured to perform a logic function, in which the MTJ device is operated, by adjusting a magnitude of current flowing through the MTJ device, wherein the current control unit controls a direction of current crossing between the top and bottom electrodes, and changes the magnetization direction of the free layer according to the direction of current crossing between the top and bottom electrodes, wherein the current driving unit is turned on or off in response to an input logic level, and thus the magnitude of the current flowing through the MTJ device is adjusted, wherein the current control unit comprises inputs corresponding to a logic level required to adjust a write operation, a logic level required to determine a type of operating logic circuit, and two logic levels required for a logic operation, wherein the first current driving unit includes a plurality of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) and sources of the plurality of MOSFETs are directly connected to the top electrode, and wherein the third current driving unit includes a plurality of MOSFETs and drains of the plurality of MOSFETs are directly connected to the bottom electrode.