A new applicable and multilayer design of nanoscale adder–subtractor using quantum‐dots
Yuan Gao, Bayan Omar Mohammed · Concurrency and Computation Practice and Experience · 2022
Abstract Quantum‐dot cellular automata (QCA) is a technique that can substitute silicon transistors. Besides, the computational architecture and systems are focused on nanoscale QCA in response to industry demands for energy‐efficient and high‐performance computing systems. Because of the importance of adder/subtractor designs in logical circuits, a novel QCA‐based adder/subtractor design is suggested in this study. A full adder is developed first, followed by a full subtractor. These QCA‐based adder/subtractor designs are simple, ultra‐efficient, constructive, and have easy input and output access. To create the required output, these circuits make use of quantum technology's intrinsic features. The QCADesigner program is used to assess the simulation findings of the recommended designs. Additionally, these designs are investigated in terms of complexity, clocking, cells, and latency. It shows that the recommended design is more efficient than standard designs regarding the area, cell count, and cost. These circuits are among the circuits in which easy access to inputs and outputs is provided, and their connection to other circuits makes them more practical. In addition to the above, the low number of cells, high speed, and easy implementation are among the innovations of the presented circuits.