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20081ee110_1_hw6

# 20081ee110_1_hw6 - EE110 HW6 Due on the Final Problem 1 If...

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EE110, HW6, Due on the Final Problem 1. If the op amp shown in Fig. below is assumed to be ideal ( = i R , 0 = O R , and = A ), find R in . + 20 k Ω 20 k Ω R x R in Problem 2. Let (S) 05 . 0 8 0025 . 0 1 . 0 = y for the two-port of Fig. below. ( a ) Find values for the ratios V 2 / V 1 , I 2 / I 1 , and V 1 / I 1 . ( b ) Remove the 5 Ω resistor, set the 1 V source equal to zero, and find V 2 / I 2 . + V 2 + [ y ] V 1 + 2 Ω 5 Ω 1 V I 1 I 2 Problem 3. The admittance parameters of a certain two-port are (mS). 2 20 5 10 = y Find the new y if a 100 Ω resistor is connected: ( a ) in series with one of the input leads; ( b ) in series with one of the output leads.

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Problem 4. Complete the table given as part of Fig. below, and also give values for the y parameters. + + Linear, passive network V s 1 V s 2 I 1 I 2 V s 1 (V) V s 2 (V) I 1 (A) I 2 (A) 5 0 Exp’t #4 5 Exp’t #5 15 100 50 5 - 32.5 Exp’t #1 50 100 - 20 - 5 Exp’t #2 20 Exp’t #3 0 Problem 5. Consider the general linear network of Fig. in Problem 1. Calculate (a) V 2 if ) ( 2 5 Ω = j j j z and (A); 0 2 20 2 ° ° = I (b) I 1 if ) ( 4 4 2 Ω − = j j z and (V). 5 4 05 1 30 137
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