Fundamental 1:2 demultiplexer design in quantum-dot cellular automata nanotechnology

Abstract

There are many issues with complementary metal oxide semiconductor (CMOS) technology in the ultra-nanoscale regime. A quantum-dot cellular automaton (QCA) is a promising innovation for crafting logic circuits in nanoscale dimensions. It provides lower power dissipation, better functionality, faster switching frequency, and better performance than that of the CMOS technology, which makes it a potential candidate for succeeding the CMOS technology. Demultiplexer is a needed operation to operate at the receiver side of the communication system, which converts the multiplexed data into original ones. Hence, a fundamental 1:2 demultiplexer is proposed using QCA technology. The proposed demultiplexer uses only 17 QCA cells and a single clock. The proposed 1:2 demultiplexer decreases the number of cells, hence occupying less layout area and a minimum clock as compared to the available works in the field. The proposed demultiplexer circuit improves the cell count by 19.05 %, the QCA clock by 50 % and the QCA cost by 64.25 % as compared to the best reported work in the literature. The energy dissipation of the suggested demultiplexer is examined using the QCA Designer-E and QCA Pro-tools. The proposed demultiplexer dissipates only 1.38 meV of average energy per cycle and is computed using the QCA Designer-E tool. The total energy dissipation for the proposed demultiplexer is improved by 22.85 % as compared to the best-reported work in the literature and is estimated using the QCA Pro-tool.