Design of an Efficient Multilayer Hybrid Reversible Spintronic Ripple Carry Adder Using Quantum Cellular Automata Technique

Abstract

Quantum-Dot-Cellular-Automata (QCA) using Spintronic electrons is a promising alternative to the traditional CMOS technology in this modern era to design any nano-sized electronic structure. The majority of the current digital components are being designed using QCA-cell-interaction. In some cases, reversible logic with the Spintronic-QCA-technique is also being explored to design various digital components. Because of this, the various aspects for the design of a novel hybrid QCA-based Spintronic advance reversible adder and its efficiency measures are presented in this research work by investigating area-occupation, temperature-tolerance, delay, power dissipation, and output strength. The results obtained in this work establish that the proposed design is more efficient in all respect compared to existing designs reported in recent literature. In this paper, 18nm quantum cells are used to design the proposed structure and when the power dissipation based on the total occupied cell area is calculated (100W/cm2), it is found that there is an assurance to get an adder structure with the less occupied area, less power dissipation and higher speed compared to previously published referred design. The temperature-tolerance and output-strength increment with layer separation gap reduction in multilayer platforms are also some additional advancements of the proposed structure, which are also clearly reflected. In this paper, QCA-based “Ripple-Carry-Adder (RCA)” is designed using Spintronic reversible logic in multilayer mode with different composite elements along with a “3-input-majority-voter-gate (MG)” to make the design more compact. QCADesigner 4.0 tool is used as widespread simulation trains to validate the design outcomes and measure different parameters individually.