Final Solutions

Final Solutions - ECE323 Final Exam (Open book) Name...

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ECE323 Final Exam (Open book) Name (print): ___ Use space provided. Show your work. Answer all 4 problems. Circle your final results. Q1 /24 Q2 /26 Q3 /25 Q4 /25 Total /100 No aid was given, received or observed. Signature : _____________________________ 03/08/2006
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1 Q1. (24 points) (A) Consider an n -channel MOSFET with 0.5 t VV = , 2 600 / , n cm V s µ =⋅ 32 1.5 10 / ox CF m and /2 0 WL = . Find the current D I in the following two figures: (a) (6 points) () 43 7 2 2 6 3 600 10 1.5 10 900 10 90 / 1 4 Triode region 1 2 90 10 20 (4.5 0.5) 7.20 10 7.2 nn o x DS GS t Dn G St D S D S kC A V V V V W ik V V L mA µµ −− == × × × = × = =< = ⎛⎞ =− ⎜⎟ ⎝⎠ ×× = (b) (6 points) 2 2 62 90 / > Saturation region 1 2 0.5 90 10 20 (5 0.5) 900 10 4.5 1.8225 o x D G DS GS DS GS t DnG S t A V V V V W V V L mA = = × × × =×× = 5 V + G D S + + 1 V + D I 5 V + G D S + D I
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2 (B) (12 points) Find the labeled voltage 1 V and 2 V in the circuit below, assuming 2 1, / ( 2) 1 / tn o x VVC WL m A V µ == and 0 λ = . () 1 2 33 2 2 10 4 2 2 Saturation region 2 2 21 0 11 0 ( 1 ) 1 2 2.414 2.414 D DG DGt Dn o x G S t GS GS SGG S Im A VV VVV W im AC
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Final Solutions - ECE323 Final Exam (Open book) Name...

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