V-Impact 2015-Innovations in Micro-electronics, Signal Processing and Communication Technologies

"V-Impact 2015 Conference Papers "

Performance Evaluation and Comparative Study of Different High-K Poly-Si and Metal Gate Stack in MOSF[ ]


The unceasing demand of miniaturization has reduced the SiO2 gate dielectric layer thickness to nearly 5 atomic layers. Oxide breakdown due to hot electron tunneling is a critical concern at this level as it contributes to gate current leakage through the gate. Any further scaling is bound to increase the already tricky gate current leakage and lead to more power loss, increased power consumption and excessive heat generation. Materials with high dielectric constant, K, are required to reduce leakage and improve performance. In this paper, the use of High K dielectric material Hafnium Oxide (HfO2) over SiO2 as dielectric and metal gate over poly-Si gate were compared.

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Comparative Study and Mathematical Modeling of Power Dissipation in 6-Transistor SRAM and 7-Transistor SRAM[ ]


In this paper, we have proposed the concept of 7-Transistor SRAM. 7-Transistor SRAM has been designed to provide an interface with CPU and to replace DRAM in systems that require very low power consumption. The feature of 7-Transistor SRAM like low power consumption and leakage current have been analyzed with 45nm technology. The comparative study and mathematical modeling have been proposed for 6-Transistor SRAM and 7-Transistor SRAM with the help of various performance parameters like Aspect Ratio, Area and Delay Considerations.

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Performance Evaluation and Comparison of Ultra-thin Bulk (UTB), Partially Depleted and Fully Depleted SOI MOSFET using Silvaco TCAD Tool[ ]


Device miniaturization is an important part of VLSI design, which refers to reduction in dimension of device by keeping all other characteristic constant. As technology node is moving in submicron region, the performance of the device degrades due to short channel effects and narrow channel effects. The key issues due to these effects are drain- induced-barrier–lowering (DIBL), leakage current, hot electron reliability, punch through, sub-threshold slope, oxide breakdown, mobility, body effect, parasitic capacitance and parasitic resistance. In this paper, we have done in depth study of short channel effects. Then, we have provided their remedies by Substrate Engineering. The comparison of Ultra-thin bulk (UTB), Partially Depleted SOI MOSFET and Fully Depleted SOI MOSFET have been done by various performance parameters using Silvaco TCAD tool.

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Performance Evaluation and Comparative Study of Double Gate SOI MOSFET and FinFET using Silvaco TCAD Tool[ ]


Transistor size is decreasing day by day, therefore it is difficult to overcome the problem of short channel effects. For preventing short channel effects, source/drain engineering, substrate engineering & gate engineering have been introduced. According to chronological growth of VLSI Design, there is need of non-conventional structure of MOSFET and researchers are getting shifted in search of other structure of transistor such as Silicon on Insulator MOSFET, Double Gate MOSFET and FinFET. In this paper, the semiconductor physics and basic electrical properties of Double Gate MOSFET and FinFET have been described. The performance evaluation and comparative study have been done by various performance parameters with the help of SILVACO TCAD tool. The study shows that Double Gate MOSFET and FinFET have better results than conventional MOSFET and are better option for reducing short channel effects.

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Compact CPW Fed Balloon Shaped Patch Antenna for UWB & Wi-Max Applications[ ]


This paper presents the design and performance of CPW fed balloon shaped patch antenna having rectangular stab of overall size 30mm × 26 mm × 1.59 mm. The proposed antenna is simulated by applying CST Microwave studio simulator. This antenna has wide impedance bandwidth of 5.19 GHz (2.81 GHz – 8.00 GHz) with flat gain (close to 3-4dBi) in the desired frequency range. This antenna may be a useful tool for Wi-MAX communication bands and lower and median UWB bands.

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Fault Prediction in Ball Bearing by Using analytical wavelet transform (AWT)[ ]


The real-time condition monitoring is an advanced technique that predicts the real conditions of operation of the machinery. A predictive maintenance program includes various rotating machinery condition monitoring techniques of the machine to determine the conditions of failure. Over the past few years there has been a major technological developments related to digital system, including innovations in both hardware and software. In the present work, an experiment is carried out with a customized test setup where the seeded defects are introduced in the inner race and outer race of a radial ball bearing. The relationship between the acquired vibration data and their relation with the seeded defect is found in this paper. When experiment is performed on the test setup designed for Fault prediction, Analytical Wavelet Transform proved an effective tool for the analysis of vibration signal. In this work, AWT followed by the Power Spectral Density is implemented on vibration signals of a defective radial bearing.

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Photonic Crystal Fiber Characteristics Benefits Numerous Applications[ ]


This paper is emphasized on the basic properties of Photonic Crystal Fiber (PCF) and applications related to them. This gives us idea about how PCF came into existence and advantages we get in thousands of application. Apart from this we also see the guidance mechanism and how it is different from those of conventional fibers.

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A REVIEW PAPER ON ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM)[ ]


This paper discusses the structure and implementation of an OFDM modem employed in wireless communication. Orthogonal rate of recurrence Division Multiplexing (OFDM) is just about the latest modulation techniques used so that you can combat the frequency-selectivity from the transmission channels, achieving substantial data rate without inter-symbol disturbance. This technique is employed for bandwidth hogging applications including Video Conferencing, DAB, DVB, and many others. Multi-user capacity possible making use of MC-CDMA. OFDM is several techniques proposed to be employed in 4th Generation cellular Systems For the majority of all part, Orthogonal. The bit error rate along with the ISI in multipath surroundings in conventional techniques for instance QAM are very high which often can be reduced by putting into action the OFDM technique. Nonetheless, the occurrence of the actual potentially high peak-to-average electrical power ratio (PAPR) restricts the application.

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A Review Paper on: Autonomous Underwater Vehicle[ ]


This paper describe general overview of design and use of the Autonomous Underwater Vehicle. The major part of earth is water (70 percent) and only few part is land (30 percent). In comparison to dry land only few part of underwater environment is known to us.To better understand the underwater environment and manage this environment and for searching we need detailed accurate and detailed information but it is clearly impractical to manually explore it. However an automatic machine can do this , and this reason for the development of Autonomous Underwater Vehicle.

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Review paper of Solar Powered UAV[ ]


As all the technology giants these days are battling to extend their influence and to find new users in all the corners of the world not only on land but also expanding beyond sky. Withthe solar-powered drones that will beam broadband Internet access to the entire developing regions whichhouses many newly growing web users across untouched areas on which these companies want desperately want to get their hands on.What these future satellite-style drones are able to do with help of modern technologies is pretty amazing, these types of drones will on only be effective in commercial but also plays a major role in defence of a country.

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PHOTONIC CRYSTAL FIBER- AN OVERVIEW[ ]


This review paper gives an overview on Photonic Crystal Fiber (PCF) & its applications. Photonic Crystal Fiber is also known as micro structured or Holey fiber. Photonic crystal fiber is preferred over optical fiber because of its high design flexibility. Photonic crystal fiber is actually an optical fiber with a periodic arrangement of low index material in a background with high refractive index material. Light can be guided inside the PCF by either modified total internal reflection or photonic band gap guidance. Discussion of PCF in this paper includes its fabrication as well as application. Two methods namely “Stack and draw technique” & “Extrusion fabrication process” are used for the fabrication.

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IMPORTANCE OF PROSODIC FEATURES IN LANGUAGE IDENTIFICATION[ ]


Earlier Researches in LID systems found that inclusion of prosodic features (alike, speech rate, Fundamental Frequency and Syllable timing) offered a little to develop the performance of their systems. Focused study on the utility of prosodic feature is attempted to evaluate parameters to behold the fundamental frequency and amplitude contours on syllable – by-syllable bases. The timing relationship is computed from the F0 whereas histogram of features (feature pairs) are collected through amplitude information followed by computations of loglikehood ratio function for evaluating the unknown utterance (word/ speech) in a pair wise discrimination task.

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A Review Paper on Li-Fi Technology[ ]


Now-a-days, internet has become a major demand people are in search of Wi-Fi hot spots. Li-fi or Light Fidelity was invented by Professor Harald Hass of university of Edinburgh. This is the latest technology in present day communication system which makes the use of LEDs, Light Emitting Diodes that helps in the transmission of data much more faster and flexible than the data that can be transmitted through Wi-Fi. It is basically a 5G technology of visible light communication system which utilizes light emitting diodes as a medium of high speed communication in similar manner as Wi-Fi

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A Review Paper on Mobile Charging Using Microwaves[ ]


It is a hectic task to carry everywhere the charger of mobile phones or any electronic gadget while travelling or it is very cruel when your mobile phone getting off by the time you urgently need it. Battery life is a major problem in present electronic gadgets. The world is moving towards in the direction of developments in technology, but the technology is still incomplete just because of some limitations. Today?s world requires the complete technology and for this purpose we are proposing „Wireless Charging of Mobile Phones Using Microwaves?.

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Inter-Symbol Interference Reduction by Orthogonal Frequency Division Multiplexing[ ]


This thesis will discuss the intersymbol interference reduction techniques. ISI can reduce by OFDM used in wireless communication. OFDM is a multipath communication system. In telecommunication, inter-symbol interference (ISI) is a sort of deformation of a sign. In ISI one symbol interferes with following symbols has similar effect as noise, therefore fixing the communication less consistent. ISI is usually caused by multipath propagation or the inherent non-linear frequency response of a channel causing successive symbols to “smear” together. The presence of ISI in the system introduces errors at the receiver output. Therefore, in the design of the transmitting and receiving filters, the objective is to minimize the effects of ISI, and thereby deliver the digital data to its destination with the smallest error rate possible.

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