ECE3040_Homework7_Solution

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ECE 3040B: Homework #7, Solutions March 23, 2009 Page 1 of 10 G EORGIA I NSTITUTE OF T ECHNOLOGY S CHOOL OF E LECTRICAL AND C OMPUTER E NGINEERING ECE 3040B: Microelectronic Circuits Spring Semester 2009, Homework #7 SOLUTIONS 1. Common-Emitter Amplifier with PNP Transistor (30 points): (a) Draw the dc equivalent circuit and (b) find the Q-point for the amplifier circuit on the right. (c) Draw the equivalent circuit used for the ac analysis, assuming all capacitors have infinite value. (d) Redraw the ac equivalent circuit, replacing the transistor with its small signal equivalent. (e) Calculate the transistor parameters g m , r π and r o . (f) Calculate the voltage gain v o /v i . Assume β F = 135 and V CC = 9V, R 1 = 20 k Ω , R 2 = 62 k Ω , R C = 13 k Ω , R E = 3.9 k Ω , R I = 1 k Ω , R 3 = 100 k Ω , V A = .

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ECE 3040B: Homework #7, Solutions March 23, 2009 Page 2 of 10
March 23, 2009 Page 3 of 10 (c)

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## This note was uploaded on 01/17/2011 for the course ECE 3040 taught by Professor Hamblen during the Fall '07 term at Georgia Institute of Technology.

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ECE3040_Homework7_Solution - GEORGIA INSTITUTE OF...

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