Impact of Molecular Electrostatics on Field-Coupled Nanocomputing and Quantum-Dot Cellular Automata Circuits

The molecular Field-Coupled Nanocomputing (FCN) is a promising implementation of the Quantum-dot Cellular Automata (QCA) paradigm for future low-power digital electronics. However, most of the literature assumes all the QCA devices as possible molecular FCN devices, ignoring the molecular physics. Indeed, the electrostatic molecular characteristics play a relevant role in the interaction and consequently influence the functioning of the circuits. In this work, by considering three reference molecular species, namely neutral, oxidized, and zwitterionic, we analyze the fundamental devices, aiming to clarify how molecule physics impacts architectural behavior. We thus examine through energy analysis the fundamental cell-to-cell interactions involved in the layouts. Additionally, we simulate a set of circuits using two available simulators: SCERPA and QCADesigner. In fact, ignoring the molecular characteristics and assuming the molecules copying the QCA behavior lead to controversial molecular circuit proposals. This work demonstrates the importance of considering the molecular type during the design process, thus declaring the simulators working scope and facilitating the assessment of molecular FCN as a possible candidate for future digital electronics.

Design and Analysis of CNTFET based VLSI Interconnects by Using PVT Variation

With the quick progress in the area of digital electronics results in miniaturization of semiconductor Industries. In Deep Sub Micron regime, because of leakage current, power consumption is turn out to be a major issue; hence constant efforts are being made by the researchers for investigating the various ways to minimize this. There are various methods available for the same and out of several available methods use of Carbon Nano-tube technology is a promising way to design low power circuits efficiently. Here new techniques are introduced for the reduction of leakage power. Here in this work, comparison of the main performance parameters of Copper on chip nano-interconnect with CNTFET has been done. We have measured the impact of ION and IOFF current by applying Process variation in CU and CNT- Interconnects with the variation of Tubes at 32nm technology and analysed the performance of the digital circuits with scaling of technology. The different kind of simulation outcomes indicates that by applying 10% of deviation from normal value in different device characteristics parameters such as Length of Gate (LTube) of the Tube, Width (WTube) of the Tube, Threshold Voltage (Vth) of the Tube, Thickness (tot) of Tube and Source & Drain Doping concentration with Cu and CNTFET interconnects for NFET and PFET with the variation of tubes from 1 to 16. All the experimental outcomes are achieved by using HSPICE simulator using SPICE model of CU and CNT at27oC temperature by using 32nm Berkley Predictive Technology module.

El software como apoyo didáctico en la enseñanza de la electrónica digital en la educación superior en México [Software as a didactic support in the teaching of digital electronics in higher education in Mexico]

La educación actual ha sufrido diversas modificaciones, sobre todo con la aparición del COVID-19 en el mundo. Entre las herramientas tecnológicas que apoyan la actividad didáctica, están los softwares educativos; éstos permiten la simulación de prácticas en laboratorios virtuales que complementan el aprendizaje y permiten demostrar principios teóricos. En el presente artículo se llevó a cabo un análisis documental sobre el uso del software en la electrónica digital, se elaboró un temario común de la materia electrónica digital de las licenciaturas que oferta el Tecnológico Nacional de México. Finalmente se llevó a cabo un análisis del uso del software determinado hacia la materia en cuestión y se estableció una relación que indica el nivel de adecuación de este. Current education has undergone various modifications, especially with the appearance of COVID-19 in the world. Among the technological tools that support the didactic activity is simulation software; These allow to carry out virtual laboratory practices that complement the learning and allow demonstrating theoretical principles. In this article, a documentary analysis was carried out on the use of software in digital electronics, a common agenda of digital electronic matter of the degrees offered by the Tecnológico Nacional de México was elaborated. Finally, an analysis of the use of the software determined towards the subject in question was carried out and a relationship was established that indicates the level of adequacy. Learning styles were identified in the group of surveyed students, and their relationship with the level of satisfaction and achievement of the software.

Si-based MEMS Resonant Sensor: A Review from Microfabrication Perspective

With the technological advancement in micro-electro-mechanical systems (MEMS), microfabrication processes along with digital electronics together have opened novel avenues to the development of small-scale smart sensingdevices capable of improved sensitivity with a lower cost of fabrication and relatively small power consumption. This article aims to provide the overview of the recent work carried out on the fabrication methodologies adoptedto develop silicon based resonant sensors. A detailed discussion has been carried out to understand critical steps involved in the fabrication of the silicon-based MEMS resonator. Some challenges starting from the materialsselection to the ?final phase of obtaining a compact MEMS resonator device for its fabrication have also been explored critically.