Fast cost efficient Magnitude Comparator using RMG in QCA

Now days, the requirement of reduced size, low power and high speed nano-scale computation devices is increasing day by day. Due to limiting device density and higher power consumption, CMOS rapidly approaching to its limit. The growing demand of digital circuits designing for nano-scale computation attracts attention of several researchers. QuantumDot Cellular Automata proves itself best alternate solution for Complementary-Metal-Oxide semiconductor (CMOS) technology. This paper presents a faster and cost-efficient 1-bit magnitude comparator design using 3-input rotating majority gate in QCA designer 2.0.3 tool. The presented layout is also compared with the prior reported designs to prove its efficacy. It can be found from obtained results that proposed architecture achieved 32%, 33% improvement in cells utilized and delay respectively. In addition, reduce cell count causes less power dissipation. QCA Pro tool is utilized for leakage power estimation with thermal dissipation map.