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Unformatted text preview: (Yes, you have enough information to get a numerical answer!) Problem 2: A GaAs step pn-junction diode has N A = 10 17 cm-3 , N D = 10 15 cm-3 , and exhibits a breakdown voltage of 400V at T = 300K. a) What is the breakdown mechanism in this diode? b) Calculate the critical electric field. (Ks = 12.9 for GaAs) c) Approximately what would you change the donor doping to in order to obtain a diode with a breakdown voltage of 600V? Problem 3: A diode has an n=2 (R-G) saturation current of 10-10 A, an n=1 (diffusion) saturation current of 10-14 A , and a series resistance of 1 Ω . Determine the voltage drop across the diode for the currents shown in the table Current Voltage drop 4.75 nA 5.5 mA 0.1 A...
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This note was uploaded on 03/25/2011 for the course ECE 305 taught by Professor Melloch during the Spring '08 term at Purdue University.
- Spring '08