hw5_su08_sol - 4.36 3.5 [V ] 115 [A] = 30.4 [k ] iD = 1 (...

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4.36 R = 3 . 5[ V ] 115[ μA ] = 30 . 4[ k Ω] i D = 1 2 ( μC ox ) × W L × ( V GS - V t ) 2 i D = 115 × 10 - 6 = 1 2 × 60 × 10 - 6 × W 0 . 8 × 10 - 6 × [(3 . 5 - 5) - ( - 0 . 7)] 2 W = 4 . 2[ μm ] 4.37 V GS 1 = 1 . 5 - 0 = 1 . 5[ V ] i D = 120[ μA ] = 1 2 × 120 × 10 - 6 × W 1 1 × 10 - 6 × (1 . 5 - 1) 2 W 1 = 8[ μm ] V GS 2 = 3 . 5 - 1 . 5 = 2[ V ] 120[ μA ] = 1 2 × 120 × 10 - 6 × W 2 1 × 10 - 6 × (2 - 1) 2 W 1 = 2[ μm ] R = 5[ V ] - 3 . 5[ V ] 120[ μA ] = 12 . 5[ k Ω] 1
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4.41 V I = V GS = 5[ V ] , V o = V DS = 0 . 05[ V ] r DS = 50[Ω] = V DS i D i D = 0 . 05 50 = 0 . 001 = 1[ mA ] R = V DD - V o i D = 5 - 0 . 05 1 = 4 . 95[ k Ω] V DS < V GS - V t triode region i D = k 0 n W L h ( V GS - V t ) × V DS - V 2 DS 2 i 1 × 10 - 3 = 100 × 10 - 6 W L h (5 - 1) × 0 . 05 - 0 . 05 2 2 i W L = 50 4.44 a) V GS 2 = - V 2 , I = V 2 - ( - 5) 1 × 10 3 = 1 2 × 2 × ( - V 2 - 1) 2 V 2 + 5 = V 2 2 + 2 × V 2 + 1 V 2 2 + V 2 - 4 = 0 2
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V 2 1 = 1 . 55[ V ] , V 2 2 = - 2 . 56[ V ] V 2 = 1
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This note was uploaded on 09/07/2011 for the course ECE 442 taught by Professor Schutt-aine during the Summer '08 term at University of Illinois at Urbana–Champaign.

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hw5_su08_sol - 4.36 3.5 [V ] 115 [A] = 30.4 [k ] iD = 1 (...

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