Area and Energy Efficient QCA based Decoder

Quantum Dot Cellular Automata (QCA) is a layout level tool used for designing digital logic circuits at nano scale. It can be regarded as the substitute for CMOS technology in nano-scale. Designing decoders in nano scale (QCA) provides advantages such as effective area utilization, energy dissipation and cost. The aim of the paper isto minimize the number of cells, area, cost and the cost energy dissipation in decoders. This paper presents a cost effective and compact design for QCA based 2 to 4 and 3 to 8 decoders. The paper proposes a design for the decoders in a multi-cell layer structure with appropriate energy dissipation analysis. The proposed 2 to 4 decodercircuit has achieved an overall improvement of 29.57% in terms of cell count and an improvement of 68.8% in cost function compared to reference circuit. The proposed 3 to 8 decoder circuit has a reduction of 53.8% in total cell count and 59.25% in terms of cost function w.r.t the earlier proposed circuits. The energy analysis is performed by QCADesigner-E tool and the circuit isrealized in QCADesigner 2.0.3 CAD tool. The proposed decoder is pre-eminence compared to reference decoder in terms of cost, cell count, area andenergy dissipation. � 2021 IEEE.