Design of Cost-Efficient QCA Reversible Circuits via Clock-Zone-Based Crossover

摘要

Nanotechnologies, remarkably Quantum-dot Cellular Automata (QCA), offer an attractive perspective for future computing technologies. In this paper, QCA is investigated as an implementation method for reversible logic. A novel Reversible Gate is developed using QCA technology. Performance of the proposed gate is verified using thirteen standard three variables Boolean functions, which demonstrate from 14.3% to 42.8% superiority in term of gate counts obtained with other reversible gates. Proposed reversible gate requires switching and leakage energy dissipation of 0.168 eV and 0.271 eV, respectively, at 1.5 E ~(k)energy level. The proposed gate uses 146 cells occupying only 0.14 μ m_(2)area and then used to design a full adder. We use a coplanar QCA crossover architecture in the designs that uses non-adjacent clock zones for the two crossing wires. These designs have been realized with QCADesigner.