LAB4-09

# LAB4-09 - of A d Vary the frequency until 0.71 vi of A A = × This is the 3 dB point Measure Lf f and Hf f the lower and upper 3 dB frequencies e

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ECE 225 ELECTRONIC CIRCUITS LABORATORY EXPERIMENT #4 FREQUENCY RESPONSE OF A TWO-STAGE AMPLIFIER Prelab : Determine the values of 11 R , 12 R , 21 R and 22 R such that CE V =5 volts for Q1 and Q2. LAB PROCEDURE: Construct the circuit shown in the Figure. a) Measure CE V and adjust the base bias networks such that CE V = 5 volts for each stage. b) Adjust the frequency of the signal generator until the ratio / of o i A V V = is a maximum. c) Record this frequency and the magnitude of the midband gain

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Unformatted text preview: of A . d) Vary the frequency until 0.71 vi of A A = × . This is the 3 dB point. Measure Lf f and Hf f , the lower and upper 3 dB frequencies. e) Take measurements of vi A vs. f . Be sure you take enough readings around Lf f and Hf f to create a Bode plot of the magnitude of vi A (in dB) vs. f . f) Also take measurements of o A and 1 A vs. f . Create Bode plots of | o A | vs. f and | 1 A | vs. f . (in dB)...
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## This note was uploaded on 01/12/2011 for the course EECS 203 taught by Professor Wu during the Spring '08 term at Northwestern.

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LAB4-09 - of A d Vary the frequency until 0.71 vi of A A = × This is the 3 dB point Measure Lf f and Hf f the lower and upper 3 dB frequencies e

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