Design and Implementation of 1-bit Comparator in Quantum-dot Cellular Automata (QCA)

Ali Newaz BAHAR, Krishna ROY, Md. ASADUZZAMAN, Mohammad Maksudur RAHMAN BHUİYAN
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Abstract. For immense demand of speedy high-end gadgets, chips are becoming denser, but Moore's law is falling flat lately. Complementary Metal-Oxide-Semiconductor (CMOS) technology is on its brink. Quantum-dot cellular automata (QCA) has become a potential alternative technology to provide faster speed with low power dissipation at nano-scale extent. Here, we proposed an efficient QCA design of 1-bit comparator. The proposed comparator required 59% less area and dissipated 82% less energy. QCADesigner has been used to design and simulate the proposed comparator. Finally, QCAPro tool has been employed for estimating energy dissipation.

Keywords: Comparator, Energy dissipation, QCA Designer, QCAPro

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