Application Report SLVA477A – December 2011 – Revised August 2012 Basic Calculation of a Buck Converter’s Power Stage Brigitte Hauke ....................................................................................... Low Power DC/DC Applications ABSTRACT This application report gives the formulas to calculate the power stage of a buck converter built with an integrated circuit having a integrated switch and operating in continuous conduction mode. It is not intended to give details on the
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SINGLE ELECTRON TRANSISTOR SEMINAR ABSTRACT A single-electron transistor consists of a small conducting island connected to the source and drain leads by tunnel junctions and connected to one or more gates. The nanometre scale conductive island is embedded in an insulating material. Gate signals are capacitive coupled to the island. Two gate signals can be applied to the island out of which one is optional. Here‚ only one electron can tunnel from source to drain. The processes
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characteristics of a BJT is called the ________early_____________ effect which is a result of ______________base width modulation_____________________. Short Questions (1 point for each blank) 8. The total capacitance of an ideal MOS structure includes the capacitance of ____SiO2_______ and the capacitance of _____depletion_region____________. 1. The Hall effect measurements yield the following information about a piece of semiconductor : ____type of the material___________ ‚ ______doping concentration_____________
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cascaded H-bridge (CHB) multilevel converter is one of the solutions which could deal with the aforementioned challenges. However‚ the topology based on the CHB converter faces the issue of leakage current that flows through the solar panel parasitic capacitance to ground which could damage the PV panels and pose safety problems. This paper proposes a multiphase isolated DC/DC converter for the CHB topology for a large-scale PV system which eliminates the leakage current issue. At the same time‚ the multiphase
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Chapter 9 Review Questions 1. What is magnetism? 2. Torque is ________. 3. A magnetic field is _________. 4. True or False: A permanent magnet is a piece of material that has been magnetized and can hold its magnetic strength for a reasonable length of time. 5. How is an electromagnet produced? 6. Which of the following produces the best electromagnet? 7. Unlike poles of a magnet _________each other and like poles_________ each other. 8. What part does polarity play in the operation of
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powers S1‚ S2‚ for the two impedances and S3for the motor. b. Determine the total power taken from the supply‚ the supply current‚ and the overall power factor. c. A capacitor is connected in parallel with the loads. Find the kvar and the capacitance in F to improve the overall power factor to unity. What is the new line current? 6. A 4157- Vrms‚ three-phase supply is applied to a balanced Y-connected three-phase load consisting of three identical impedances of 4836.870. Taking the
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The following describes filter types‚ what they do and how they perform. Along with definitions and detailed graphs‚ we are hopeful this information is both useful and informative. Filter Types Monolithic Crystal Filters 2 Quartz resonator internally coupled utilizing piezoelectric effect. Discrete Crystal Filter Single quartz resonator with external components utilizing the piezoelectric effect. Notch filters Crystal or Discrete component filter that passes all frequencies
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Circular motion‚ gravitational field‚ and oscillation 1.Define gravitational field strength: Force per unit mass 2. Explain why there is a point between two point masses at which the gravitational field strength is zero. Because gravitational fields of two masses are in opposite directions‚ so there is a point where it is zero What is meant by angular velocity The rate of change of the angular displacement of an object as it moves along curved path. Generally when asked to test
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BC107 BC108 LOW NOISE GENERAL PURPOSE AUDIO AMPLIFIERS DESCRIPTION The BC107 and BC108 are silicon planar epitaxial NPN transistors in TO-18 metal case. They are suitable for use in driver stages‚ low noise input stages and signal processing circuits of television reveivers. The PNP complemet for BC107 is BC177. TO-18 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit BC107 BC108 V CBO Collector-Base Voltage (IE = 0) 50 30
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Table of Contents Objective – Chapter 1 1 1.0 INTRODUCTION TO ELECTRICAL CIRCUITS 2 Basic Quantities and Units in Electrical 2 Quantities 2 Units 3 Factors Affecting Resistance 4 Length of the Conductor: 4 Area of Cross-Section of the Conductor: 4 Electrical Resistivity of Substances 5 Effect of Temperature 5 Components of Electrical Circuits 6 Components of an Electric Circuit 7 Measuring Current‚ Voltage and Resistance 8 Measuring voltage 8 Measuring current 9 Measuring
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