Nano-scale design of reversible adder using quantum-dot cellular automata
Javeed Iqbal Reshi, Mohammad Tariq Banday · 2016
Over the past few years, researchers have demonstrated various features of reversible logic design as solution to the problem of power consumption due to the information loss, that will exceed the power consumption of the devices. Besides, the reversible logic combined with novel device paradigm of Quantum dot Cellular Automata (QCA) promises to offer low-power dissipation, high packaging density and operation at Tera-hertz frequencies in the nano-scale regime. Arithmetic adder forms the most important block for every digital processor. In this paper, novel designs for reversible adder have been introduced. These designs have been achieved after the introduction of novel nano-scale designs of Feynman and Toffoli gates, which offer the features of low-cell count, low-cell area, less-complexity and reduced-latency. The proposed designs have been successfully verified using QCADesigner tool. The results have demonstrated that the proposed QCA based designs lead to significant improvements in performance vis-à-vis their counterpart designs.