A New Design of D Flip-Flop Using Quantum-Dot Cellular Automata
Meenu Sankalp, Amanpreet Sandhu · 2021 2nd Global Conference for Advancement in Technology (GCAT) · 2021
The CMOS technology has reached its physical fundamental limit. Due to the shortcomings in CMOS like the short channel effect, doping fluctuations, leakage current, an extensive research is going on. Though various technologies have been proposed, Quantum-dot cellular automata seems to be more attractive technology. QCA is transistor less. It can replace complementary metal–oxide–semiconductor (CMOS) at nano-scale level. The novel digital technology has the advantages of reduced area, high performance. Quantum dot cellular automata requires the basic components like inverters and majority gates. In this paper three new D-Flip Flop have been proposed. The proposed D flip flops are implemented with three-input majority gate. The D Flip-Flop design shows much improvement in terms of cell count, occupation area and input to output delay. The occupation area of proposed D Flip Flop designs have been reduced to 0.05%, 0.07% and 0.78% as compared to the design given in literature. QCA designer 2.0.3 is used to design, simulate and verify the output the circuits.