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Unformatted text preview: 1 ECED3201: Introduction to Electronics Fall 2009 Dalhousie University, Department of Electrical and computer Engineering Assignments #5 Problem 1 - [5 points]: A tunable resonator requires a variable capacitance with characteristic shown in Fig. 1. a) Find C jo , V o , the doping levels in atoms/cm 3 , the cross-section area of the junction A and finally the width of the depletion region W dep for V R = 0. Use = 1 + and assume n i 10 10 atoms/cm 3 and N A = N D . Fig. 1 Problem 2 - [4 points]: The Schottky diode is a special kind of diode named after the inventor Walter Schottky. a) Search the internet to learn about this diode and explain briefly some of the differences between it and a standard silicon pn junction diode. Also states its advantages and disadvantages compare to a silicon pn junction diode. Problem 3 - [5 points]: The light-emitting diode (LED) converts the forward biasing current into light. This can be done by fabricating the pn junction using special kind of semiconductor materials (e.g be done by fabricating the pn junction using special kind of semiconductor materials (e....
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