Designs of Level-Sensitive T Flip-Flops and Polar Encoders Based on Two XOR/XNOR Gates

Quantum-dot cellular automata is a novel nanotechnology that has the advantages of low energy dissipation, easy integration, and high computing speed. It regarded as one powerful alternative technologies for next generation integrated circuits because its unique implementation concept. In this paper, two XOR/XNOR gates are proposed. Level-sensitive T flip-flops, negative edge-trigger two-to-one multiplexers, reversible gates, (8, 4) polar encoders implemented based on these proposed logic gates. Simulation results show that, compared with existing level-sensitive second flip-flop fewer cells lower dissipation; best encoder, cell count area encoder decreased by 13.67% 12.05%, respectively. The have stable output which can be flexibly designed into complex quantum-dot circuits.