A novel design and analysis of comparator with XNOR gate for QCA

Quantum-dot cellular automata (QCA) is an emerging nanotechnology. It has attracted much interest for its potential for faster speed, smaller size, and lower power dissipation than conventional transistor-based technology. QCA XNOR gate is proposed in this letter and the reliability, AVG Energy Dissipation of Circuit (AVG EDC) of it have been analyzed. Multi-bit comparators have been implemented with preferable XNOR gate proposed in this letter and they have lower complexity and Efficient Complexity than previous ones. The detailed simulation results using QCADesigner are presented finally.