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

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NAME ____________________________________ EXAM 1 - SOLUTIONS (Closed book) ECE 442 July 7, 2008 8:00 a.m. – 9:00 a.m. Instructions : Write your name, and NetID where indicated. You are allowed to use a calculator. This examination consists of 3 problems. Show all work in order to receive partial credit. Problem 1 (40 pts) Problem 2 (40 pts) Problem 3 (20 pts) Total (100 pts)

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- 2 - Formula Sheet DIODE / ( 1) D T V V D S I I e ! " , where 26 mV B T k T V q ! ! BIPOLAR (NPN forward active I B >0, V CE >V CE , sat ) / / 1 BE T BE T V V V V CE C S S A V I I e I e V # \$ ! % & ( ) * + where 26 mV B T k T V q ! ! 1 CE C E B B A V I I I I V , - - # \$ ! ! % & ( ) * + 1 - , - ! & Small Signal Characteristics: . / ; ; 1 ; ; A C T m m e e o T E C V I V g g r r r r r V I I ! ! ! & ! ! 0 0 - - 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 V V V V 1 2 2 ( ) 2 3 # \$ ! % " % " ( ) * + DS D n ox GS T DS V W I C V V V L Active Region (Saturation) & , GS T DS DSP V V V V 1 4 5 6 2 ( ) 1 2 3 7 ! % % " % & % n ox D GS T DS C W I V V V L Body Effect . / 2 2 T To SB F F V V V 8 9 9 ! & % & " , 0 GS T D V V I : !
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