A New Efficient Nanodesign of Composite Gate Based on Quantum Dot Cellular Automata

Abstract

The development of nanoscale technologies has come from the downsizing of electronic equipment and the inadequacy of CMOS innovation resulting from hybrid circuit establishment and its failure to respond to nanoscale. Quantum-based technologies, like quantum-dot cellular automata (QCA), are likely to succeed the present technologies due to their incredible benefits, like faster processing, smaller footprints and ultra-low energy usage. In arithmetic and comparison circuits, the fundamental gate is frequently used. Arithmetic logic circuits centered on OR, AND and NOT logic gates have a low design complexity. To obtain complicated logic gates, several architectures have been proposed in the QCA. This work offers a QCA composite gate that achieves all critical digital logic gates, including Inverter, OR, AND, NAND, NOR and exclusive gates like XOR and XNOR. All basic logic is generated in a single unit with this architecture. Only 0.09[Formula: see text][Formula: see text]m2 of area, three three-input majority gates, one XOR, three Inverters, and 0.5 clock zones were required for the suggested circuit. As a result, a decrease of 33% in cell count is achieved compared to the previous systems. The design is evaluated and the dissipated energy is analyzed. For the research on power dissipation, the QCADesigner-E simulator is used to verify the final result. The simulation outcomes show that the suggested layout is advantageous over earlier constructions regarding the area, number of cells, clock phases and cost.