A Novel Approach to Design Multiplexer Using Magnetic Quantum-Dot Cellular Automata

Magnetic quantum-dot cellular automata (MQCA) is a recent technology in computation based on closely coupled ferromagnetic and antiferromagnetic dots; it is favorable as the fabrication issues arise day by day at the nanometer scale in CMOS technology. In this letter, first, we propose an MQCA-based 2:1 Multiplexer (Mux) using conventional horizontal and vertical approaches. In the next step, we propose a novel area efficient compact design approach with the help of the explicit interaction, coupling concept, and dominant nature of slant edge nanomagnets. The proposed compact design methodology leads to ~71%–97% reduction in the total number of nanodots and ~22%–99% reduction in area occupancy compared to the horizontal, vertical, nanomagnetic QCA, and existing QCA-based 2:1 Mux. To showcase the scalability of our proposed structure, we also implement an 8:1 Mux. The design layouts and simulation results are verified using the MuMax3 micromagnetic simulator.