Low Power Reversible Parallel Binary Adder/Subtractor

In recent years, Reversible Logic is becoming more and more prominent technology having its applications inLow Power CMOS, Quantum Computing, Nanotechnology, and Optical Computing. Reversibility plays animportant role when energy efficient computations are considered. In this paper, Reversible eight-bit ParallelBinary Adder/Subtractor with Design I, Design II and Design III are proposed. In all the three designapproaches, the full Adder and Subtractors are realized in a single unit as compared to only full Subtractorin the existing design. The performance analysis is verified using number reversible gates, Garbageinput/outputs and Quantum Cost. It is observed that Reversible eight-bit Parallel Binary Adder/Subtractorwith Design III is efficient compared to Design I, Design II and existing design