Efficient Design of Exclusive-Or Gate using 5-Input Majority Gate in QCA

Quantum dot cellular automata (QCA) is one of the emerging technology that has the capability of replacing the CMOS based technology at nano scale level. Majority gates and inverter are the principle elements in QCA to design any circuit. In this work, we propose a new 5-input majority gate. The new proposed gate reduces number of required cell, area and power consumption. The study of power dissipation is also explained using power estimator tool QCAPro. QCA designer 2.0.3 is used to validate the majority gate layout and their functionality. Furthermore, an XOR gate based on QCA are designed using proposed majority gate. Layout and simulation results show the improvement of proposed circuit over previous designed circuits. (paper)