# HW_9(2) - EE 438 Homework #9 Basic Transistor Amplifiers...

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EE 438 Homework #9 Basic Transistor Amplifiers Note: In the problems below assume the parameters β = 150 and V A = 100 V and that V BE = 0.7 V (DC Value) for the BJT’s. 1. Assume the following values for the components in the common emitter circuit shown below. V 10 , k 2 . 2 , 220 , k 1.2 , k 9.1 , 51 2 1 = = = = = = CC C E B B S V R R R R R . Using a DC analysis find: (a) I B , (b) I C , (c) V B , (d) V CE , (e) g m , (f) r π , and (g) r o . Using a signal analysis with o r find: (h) the signal voltage gain, i c v v v A = , (i) the input impedance, , computed from the small signal equivalent circuit looking from base terminal to ground after the source combination has been removed, and (j) the output impedance, , computed from the small signal equivalent circuit looking from the collector terminal to ground with all components in place but with the voltage source turned off. in

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## This note was uploaded on 10/26/2009 for the course EE 438 taught by Professor Cardwell during the Spring '08 term at University of Texas at Austin.

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HW_9(2) - EE 438 Homework #9 Basic Transistor Amplifiers...

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