Power electronics Mid-1 Objective exam 2011 1.When UJT is used for triggering an SCR‚ the wave shape of the voltage obtained from UJT firing circuit is a a) Sine wave (b) saw tooth wave (c)trapezoidal wave (d) Square wave 2. In a thyristor circuit‚ the angle of conduction can be changed by changing (a) anode Voltage (b) Anode Current (c) Forward Current rating (d)gate Current 3. Freewheeling diodes are mainly used for (a) Better utilization factor (b) di/dt protection
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BASIC DIODE ELECTRONICS INTRODUCTION TO DIODES The p-n Junction The p-n junction is a homojunction between a p-type and an n-type semiconductor. It acts as a diode‚ which can serve in electronics as a rectifier‚ logic gate‚ voltage regulator (Zener diode)‚ switching or tuner (varactor diode); and in optoelectronics as a light-emitting diode (LED)‚ laser diode‚ photodetector‚ or solar cell. In a relatively simplified view of semiconductor materials‚ we can envision a semiconductor as having two
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2012 14th International Conference on Modelling and Simulation Path Loss Effect on Energy Consumption in a WSN ∗ Krishna Doddapaneni‚∗ Enver Ever‚∗ Orhan Gemikonakli‚† Ivano Malavolta‚∗ Leonardo Mostarda‚† Henry Muccini Communications Department‚ School of Engineering & Information Sciences‚ Middlesex University‚ UK Email:{k.doddapaneni‚ e.ever‚ o.gemikonakli‚ l.mostarda}@mdx.ac.uk † Dipartimento Di Informatica De L’Aquila Via Vetoio L’Aquila 67100‚ Italy Email:{ivano.malavolta‚henry.muccini}@univaq
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inside in a shadowy cold room with their eyes glued to a television with scenes of gory video games of people shooting each other’s heads off. Family dinner talks turn into family members scattered throughout the house entranced in their own little electronic world. The over-use of technology is creating an impatient society and it is also diminishing once-valued personal interaction with others. More often now these days‚ people would rather let a machine take a message instead of answering a call;
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____________________________________________________________________________________________________________________ Alternating Current and Direct Current Generator Pedro Portela‚ João Sepúlveda‚ João Sena Esteves Department of Industrial Electronic University of Minho‚ Campus of Azurém‚ 4800-058 Guimarães‚ Portugal delfimpedrosa@gmail.com‚ sena@dei.uminho.pt Abstract. Spinning a wire loop within a uniform magnetic field in a convenient fashion induces a voltage between the loop terminals
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TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS Vol. 11‚ No. 3‚ pp. 93-105‚ June 25‚ 2010 Invited Paper pISSN: 1229-7607 eISSN: 2092-7592 DOI: 10.4313/TEEM.2010.11.3.093 Challenges for Nanoscale MOSFETs and Emerging Nanoelectronics Yong-Bin Kim Department of Electrical and Computer Engineering‚ Northeastern University‚ Boston‚ MA 02115‚ USA Received April 26‚ 2010; Accepted May 3‚ 2010 Complementary metal-oxide-semiconductor (CMOS) technology scaling has been a main key for continuous progress
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Electronic Revolution "The world is very different now. For man holds in his mortal hands the power to abolish all forms of human poverty‚ and all forms of human life." - John Fitzgerald Kennedy As scientists continue to piece together nature ’s mysteries of science‚ and as technology is becoming the dominating force in numerous areas worldwide‚ there is often a crucial piece of the puzzle that goes missing: responsibility. Though many people praise the abundant benefits of modern
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FAKULTI KEJURUTERAAN ELEKTRIK UNIVERSITI TEKNIKAL MALAYSIA MELAKA SEM 1 SESSION 2013/2014 REPORT BEKU 2321 ELECTRONIC TECHNOLOGY LABORATORY Experiment 1: Group Members : Member Name Matric Number Elabbas Abdelhamied B011210274 Ahmed Galal B011210296 Omer Hassan B011210288 Program/Section : 2BEKE Date : 23-10-2013 Checked By :______________________________________ Score : Report Obtained 1.0 Abstract 2 Abstract is clear and well described
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Wireless Automotive Communications Thomas Nolte and Hans Hansson MRTC‚ Department of Computer Science and Electronics M¨ lardalen University a V¨ ster˚ s‚ SWEDEN a a Lucia Lo Bello RETISNET Lab‚ Department of Computer Engineering and Telecommunications University of Catania Catania‚ ITALY Abstract This paper presents an overview of wireless automotive communication technologies‚ with the aim of identifying the strong candidates for future in-vehicle and inter-vehicle automotive applications
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I-Y ii. 1‚200 products – focus on niche architecture and customers that value unique‚ high quality over commodities The capability to tailor products to precise customer needs has generated a positive synergy for Samsung allowing the company to charge a premium for their niche component architecture. This competence of creating over 1‚200 different products has given rise to a series of interrelated reactions that are hard to imitate (inimitable) by others but are continually replicated
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