# Ex1_sol - NAME EXAM 1 SOLUTIONS(Closed book ECE 442 7:00...

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NAME ____________________________________ _______________ EXAM 1 - SOLUTIONS (Closed book) ECE 442 February 28, 2008 7:00 p.m. – 8:30 p.m. Instructions : Write your name, and NetID where indicated. You are allowed to use a calculator. This examination consists of 4 problems. Show all work in order to receive partial credit. Problem 1 (20 pts) Problem 2 (20 pts) Problem 3 (20 pts) Problem 4 (40 pts) Total (100 pts)

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- 2 - Formula Sheet DIODE / (1 ) DT VV DS II e =− , where 26 mV B T kT V q == BIPOLAR (NPN forward active I B >0, V CE >V CE , sat ) // 1 B ET B CE CS S A V e I e V ⎛⎞ =⋅ + ⎜⎟ ⎝⎠ where 26 mV B T V q 1 CE CEB B A V I I V α ββ ==⋅ + 1 β = + Small Signal Characteristics: () ;; 1 ; ; A C T mm e e o TE C V I V gg r r r r r VI I = + ππ MOSFET (long channel model equations) Define V DSP = V GS -V T , where V T is the threshold voltage NMOS PMOS Triode Region (Linear) & , GS T DS DSP VVVV >< 2 2 μ DS Dn o x G S T D S V W IC V V V L Active Region (Saturation) & , GS T DS DSP >≥ [] 2 1 2 λ + no x D GS T DS C W I V L Body Effect 22 TT o S B F F V γ φφ =+ + , 0 GS T D I ≤=
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Ex1_sol - NAME EXAM 1 SOLUTIONS(Closed book ECE 442 7:00...

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