set05new - ECE3050 Homework Set 5 1 For K = 1.78 mA V2 VT O...

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ECE3050 Homework Set 5 1. For K = 1 . 78 mA / V 2 , V TO = 1 . 5 V , V + = 18 V , R 1 = 110 k , R 2 = 68 k , R D = 0 , and R S = 1 k , write the bias equation, solve for I D , and verify that the MOSFET is biased in the saturation region, i.e. its active mode. [ I D = 3 . 897 mA , V DS = 14 . 10 V , V GS V TO = 1 . 480 V ] 2. Add a resistor R 3 from gate to source for the circuit in problem 1. (a) Show that V GG = V + R 2 k ( R 3 + R S ) R 1 + R 2 k ( R 3 + R S ) + I S R S R S + R 3 + R 1 k R 2 × R 1 k R 2 R GG = R 1 k R 2 k ( R 3 + R S ) V SS = V + R 1 + R 2 k ( R 3 + R S ) × R 2 R 2 + R 3 + R S × R S R SS = ( R 1 k R 2 k + R 3 ) k R S (b) For R 3 = 20 k , write the bias equation, solve for I D , and verify that the MOSFET is
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