The Department of Electronics and Communication Engineering is glad to announce that our PhD scholar, Mr Vasudeva Bevara and BTech students, Mr Shakamuri Narendra Chowdary and Mr Bolem Venkata Surendra Babu, published a paper titled ‘High performance 2n: 1: 2n Reversible MUX/DEMUX Architecture for Quantum-dot Cellular Automata’ in the international journal ‘Numerical Modelling: Electronic Networks, Devices and Fields (SCI Index)’ under the supervision of Dr Pradyut Kumar Sanki.
Abstract of the Research
Quantum-dot Cellular Automata (QCA) lead to fundamental changes in nanoscale technology. It promises small area, low power & high-speed structures for digital circuit design. This paper presents efficient low power structures of Reversible Multiplexer & Demultiplexer (RMD) modules based on the QCA technology. The simulation result shows that the proposed RMD modules have utilised less area & low power consumption. The simulation, layout & energy dissipation analysis of the proposed RMD module has been carried out using the QCA Designer-E simulation tool.
Essentially, CMOS is used as a well-known traditional technology in the design of the Very Large-Scale Integration (VLSI) circuits, which leads to the introduction of QCA as new nanotechnology to overcome the limitations of CMOS technology, such as material, physical, power, heat & economic challenges.
In reversible computation, the power dissipation occurs only when the computation is started or when the output is permanently stored. The reversible logic circuits are being investigated to prevent data loss in irreversible logic circuits. The reversible logic circuits provide zero loss of energy/information making the logic circuits the most suitable for QCA nanotechnologies. This has resulted in widespread interest in the design of reversible logic circuits based on QCA over the last few years.
In this paper, a modular 2n: 1 reversible multiplexer & 1: 2n reversible demultiplexer design in a single circuit is proposed. The 2:1 multiplexer & 1: 2 demultiplexer is realised in a single module i.e., 3 × 3 RMD. The 3 × 3 RMD is formed fundamental building block of the modular 2n: 1 reversible multiplexer & 1: 2n reversible demultiplexer design is extended to large RMD design.
Practical Implementations of the Research
This work can push forward research in the QCA domain and overcome the limitations of Complementary Metal Oxide Semiconductor (CMOS) technology. Soon the era of Beyond CMOS will start as the scaling of the current CMOS technology will reach the fundamental limit. QCA (Quantum-dot Cellular Automata) is the transistor less computation paradigm and viable candidate for Beyond CMOS device technology.
So, they have implemented the High Performance 2n: 1: 2n Reversible MUX/DEMUX Architecture for Quantum-dot Cellular Automata compared to other researcher works. In future, the research team would like to explore deeper into QCA technology and design efficient circuits which are small sized, with less cell count and less power consumption.
