An Innovative Low Power Full Adder Design in Nano Technology Based Quantum Dot Cellular Automata

This paper presents a novel approach for designing a Full Adder in Quantum Dot Cellular Automata (QCA) technique at nano-scale level utilizing very less no. of QCA cells. It is a promising first design of its type which can be taken as a base design for building an ultra-low power information generating systems like microprocessors. Quantum Dot cells are an artificial nano scale molecules which can pass the information without the need of current to flow into them. Any digital circuit can be fully realized using QCA cells. Comparison of the proposed approach is done with the previous approaches and realized, evaluated and tested for correctness using a QCA Designer tool, a simulation tool for QCA circuits, Version 2.0.3, which shows some superiority of the proposed approach over the previous approaches with approx. 90% reduction in total area and 87% reduction in total no. of cell counts with utilizing only 4 clock phases in the design.