A novel quantum dot cellular automata for 4-bit code converters

Quantum-dot cellular automata is a promising successor of CMOS technology. QCA proposed by Lent et al. is an emerging technology that offers an innovative approach for computing at nano-scale by monitoring the position of a single electron. This technology allows the implementation of logic devices using quantum dots instead of transistors, diodes. QCA technology has large potential in terms of high space density and power, possible to achieve miniaturization of circuits and high speed processing. The paper provides an efficient design and layout of code converters based on quantum-dot cellular automata using QCADesigner tool. In this paper a number of new results on binary to gray and gray to binary code converters and detailed simulation using QCAD designer tool is presented. We have performed a comparative study of proposed design with recent previous designs and proved that proposed design is efficient in terms of complexity, cell count, area usage and clocking.