Review 1 - EECS 320 Midterm Review #1 Fundamentals of...

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Unformatted text preview: EECS 320 Midterm Review #1 Fundamentals of Semiconductor Diode and transistor circuit Crystal Structure, QM and EM Band Diagram: DOS, m * , Fermi statistics, Carrier statistics, Continuity Equation: Drift and diffusion, R-G, MCDE Diode constant voltage drop model Examples Exponential diode model I ( ) 1 / − = kT qV e I I V Transistor T Input Output Source Control large output with small input Bipolar (BJT) I C I B L I B I E I C B C E I B I E I C B C E Collector Base C B β Ι B v BE + B C I I = β- I E E Circuit Model for FET Looks like a (nonlinear) voltage controlled current source Gate Drain Source I D I G = G D V GS +- S DS DS T GS D V V V V k I ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − − = 2 ( ) 2 2 T GS D V V k I − = = D I ( ) ⎪ ⎪ ⎪ ⎩ ⎪ ⎪ ⎪ ⎨ ⎧ < > − > − > − < ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − − = T GS T GS T GS DS T GS T GS T GS DS DS DS T GS D V V V V and V V V V V k V V and V V V V V V V k I , , 2 , 2 2 Saturation Off Linear MOSFET Circuit Example V DD Equate I D and I R to determine V out R L ( ) L out DD out out T in D R V V V V V V k I − = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − − = 2 2 2 2 2 2 = + ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ − − + L DD out L in T out kR V V kR V V V Device in Linear Resulting in quadratic equation for V out G S D I D DS out V V = GS in V V = ( ) ( ) L out DD T in D R V V V V k I − = − = 2 2 Device in Saturation ( ) 2 2 T in L DD out V V kR V V − − = This circuit may be used as an amplifier or digital logic circuit Crystal Structure Lattice Unit cell Periodic arrangement of atoms in a crystal Small volume of crystal that may be used to reproduce the entire crystal Simple cubic lattice constant a Primitive unit cell Smallest unit cell that describes the crystal Body centered cubic (BCC) Lattice constant is a material parameter Determining Miller Indices...
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This note was uploaded on 01/31/2011 for the course EECS 320 taught by Professor Philips during the Spring '06 term at University of Michigan.

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Review 1 - EECS 320 Midterm Review #1 Fundamentals of...

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