Design and Implementation of Novel Reversible Full Adder using QCA

Abstract

One of the most well-known nanotechnologies thought to continue the scaling-down theme of sub-micron electronics is quantum-dot-cellular automata. Consequently, employing this new technique, several combinational logic circuits have also been redesigned and put into use. The QCA Full adder cell, which is thought of as the standard structure in designing arithmetic circuits, has received a lot of attention in research seeking to decrease circuit complexity and delay. Here, this study suggests a single-layer reversible structure which uses a total cell count of 121 cells and area of $0.20\mu\mathrm{m}^{2}$, which shows 47.03% improvement in cell count in comparison to contemporary designs, the complete adder has fewer cells (less complexity), a smaller surface area, and a smaller overall size. The program employed was the QCA designer 2.0.3, which was used to construct and evaluate the functionality of the suggested design. To construct QCA circuit, a multilayer crossovers architecture is not preferred because to the expensive cost and growing circuit complexity.