hw8 - Fall 2005 6.012 Microelectronic Devices and Circuits...

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Unformatted text preview: Fall 2005 6.012 Microelectronic Devices and Circuits Prof. J. A. del Alamo Homework #8 November 4, 2005 Due: November 10, 2005 at lecture ( noon latest) (late homework will not be accepted) Please write your recitation session time on your problem set solution. 1. [30 points] Below is a sketch not to scale of the minority carrier distribution across the quasineutral regions of a forwardbiased pn diode. For this diode, W p x p = 10 m , W n x n = 10 m , D n = 25 cm 2 /s , and D p = 10 cm 2 /s . The area of the junction is 5 m . p p(x n )=10 14 cm-3 p(x) n i 2 N d n n(-x p )=10 13 cm-3 n(x) n i 2 N a p-side n-side x -W p -x p x n W n a) Calculate the hole current injected into the nside of the diode. b) Calculate the electron current injected into the pside of the diode. c) Calculate the diffusion capacitance associated with carrier storage on the nside of the diode. d) Calculate the diffusion capacitance associated with carrier storage on the pside of the diode. e) How much should the voltage across the junction increase if we wish to double the total current through the diode?...
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This note was uploaded on 07/20/2009 for the course ELECTRICAL 6.012 taught by Professor Prof.jesúsdelalamo during the Fall '05 term at MIT.

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hw8 - Fall 2005 6.012 Microelectronic Devices and Circuits...

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