Introducing an Innovative D Flip-Flop for Designing Quaternary QCA Register
Alireza Navidi, Reza Sabbaghi‐Nadooshan, Massoud Dousti · 2022
Taking advantage of advances in Nanotechnology, the quantum-dot cellular automata (QCA) has overcome many limitations that complementary metal-oxide-semiconductor (CMOS) had been confronted. Undesirable characteristics such as too many leakage currents limit the CMOS designs in nano dimensions. The idea of designing multiple-valued logic (MVL) systems rather than standard binary has gotten attractive to many designers. The application of MVL in the design of digital circuits offers so many advantages over traditional methods. D flip-flop is a primary sequential circuit in any register. In this paper, a novel quaternary D flip-flop based on introducing quaternary QCA (QQCA) is presented. The structure of our quaternary model is clarified. Also, we have proposed a 4-qubits register by utilizing the presented quaternary D flip-flop. Both circuits got simulated and evaluated by QCASim (quaternary edition). QCASim can illustrate the simulation result in a truth table and a waveform format. Our work got compared with other published works. The simulation results show that our proposed circuit is efficient in terms of latency and energy consumption.