# q06 - ECE 3050 Analog Electronics Quiz 6 February 18, 2009...

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ECE3050Ana logE lectron icsQu iz6 February 18, 2009 Professor Leach Name Instructions. Print your name in the space above. Honor Code: I have neither given nor received help on this quiz. Initials 1. The f gure shows a BJT di f amp. It is given that V + =+24V , V = 24V , R B = 150 , R E =75 , R C =24k , R Q =23k , V T =0 . 025V , V A = , V BE . 65V , β =74 , I E . 5mA , r e =50 , r x =30 ,and r 0 e =52 . 4 . r e = V T I E r 0 e = R B + r x 1+ β + r e . 4 g m = I C V T . 01973S r π = V T I B =3 . 75k r 0 π = r x + r π +(1+ β ) R te r 0 = V A + V CE I C = r ic = r 0 + r 0 e k R te 1 α R te r 0 e + R te = Before starting the problem, note that the answers for some of the numerical calculations are given with the above formulas. (a) For v i 2 , solve for the small-signal Thévenin resistance R te 1 looking out of the emitter of Q 1 . (b) For v i 2 , solve for the small-signal voltage gain v o 1 /v i 1 . (c) For v i 1 , solve for the small-signal voltage gain v o 1 /v i 2 . If you are clever, it is possible to make use of the solution for v o 1 /v i 1 to simplify the numerical calculations. (d) Make use of the solutions from the parts above to write the solutions for the small-signal gains

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## This note was uploaded on 05/26/2011 for the course ECE 3050 taught by Professor Hollis during the Summer '08 term at Georgia Institute of Technology.

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q06 - ECE 3050 Analog Electronics Quiz 6 February 18, 2009...

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