ECE474S09_Lecture32 - ECE 474: Principles of Electronic...

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ECE 474: Principles of Electronic Devices Prof. Virginia Ayres Electrical & Computer Engineering Michigan State University [email protected]
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Lecture 32: Chp. 05: Current State-of-Art Transistors Introduction to pn junctions pn junction no battery: No battery V0: OFF Calculate V0 (3 ways!) Calculate maximum E -field E 0 Calculate depletion region width W (xp0, xn0) pn junction with battery: Battery in Forward bias Vf: ON Battery in Reverse bias Vr: really good OFF Capacitances in pn junction: serious limitation Junction capacitance Charge storage capcitance
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Lecture 32: Chp. 05: Current State-of-Art Transistors Introduction to pn junctions pn junction no battery: No battery V0: OFF Calculate V0 (3 ways!) Calculate maximum E -field E 0 Calculate depletion region width W (xp0, xn0) pn junction with battery: Battery in Forward bias Vf: ON Battery in Reverse bias Vr: really good OFF Capacitances in pn junction: serious limitation Junction capacitance Charge storage capcitance
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Built in E -field E (x):
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| E(x ) | -magnitude changes across the depletion region E(x ) -direction is right to left
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Q=
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Lecture 32: Chp. 05: Current State-of-Art Transistors Introduction to pn junctions pn junction no battery: No battery V0: OFF Calculate V0 (3 ways!) Calculate maximum E -field E 0 Calculate depletion region width W (xp0, xn0) pn junction with battery: Battery in Forward bias Vf: ON Battery in Reverse bias Vr: really good OFF Capacitances in pn junction: serious limitation Junction capacitance Charge storage capacitance
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This note was uploaded on 06/26/2010 for the course ELECTRICAL ECE474 taught by Professor Tran-le,j during the Spring '10 term at Michigan State University.

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ECE474S09_Lecture32 - ECE 474: Principles of Electronic...

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