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202-10Prbs73-78

# 202-10Prbs73-78 - EE202 DUE MONDAY APRIL 26 FINAL HOMEWORK...

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EE202 FINAL HOMEWORK PROBLEMS SPRING 10 DUE MONDAY APRIL 26 73 . (a) Find the y-parameters of the circuit below. This must be done in a sequential manner. (i) First label the point A with two currents, one current I 2 ' points toward Y 2 and the other current points toward the dot on the transformer and is labeled I 1 ' . Label the voltage at A-B by V AB . (ii) Find the y-parameter matrix: I 1 I 2 ' ! " # # \$ % = ? ? ? ? ! " # \$ % V 1 V AB ! " # \$ % . (iii) Label the secondary side of the transformer with V CD as the voltage across the secondary and a current I 2 " toward "a". Modify the result of step (ii) to obtain I 1 I 2 " ! " # # \$ % = ? ? ? ? ! " # \$ % V 1 V CD ! " # \$ % . (iv) Complete this part by finding the overall y-parameters. (b) If Y 1 ( s ) = s , Y 2 ( s ) = 4 , Y 3 ( s ) = 4 s , g m = 2.5 S, a = 2 , and the port 2 terminals are terminated in a 1 resistor, compute an expression for the vector V 1 ( s ) V 2 ( s ) ! "

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202-10Prbs73-78 - EE202 DUE MONDAY APRIL 26 FINAL HOMEWORK...

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