Comparative Analysis of Full Adder Custom Design Circuit using Two Regular Structures in Quantum-Dot Cellular Automata (QCA)

Abstract

Regular structures in Quantum-dot Cellular Automata (QCA) allow for ease of design and uniform clocking structure. The paper presents a comparative analysis of QCA realization using regular structures: Shannon-Lattices and Programmable Logic Arrays (PLAs). A software tool was developed that generates complete QCA-Shannon-Lattice and QCA-PLA Layouts for Boolean functions based on an input characterized macro-cell library. The correctness of equations were verified by performing simulations of the generated layouts. It is shown that the new regular lattices outperform PLAs and are closer to full custom design on Full Adders.