EE3110 Bonus Question 4

EE3110 Bonus Question 4 - Once you have determined the main...

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EE3110 Bonus Question 4: Feedback Amplifier, due before lecture on Tuesday 4 th November. For the amplifier shown, determine the input impedance, output impedance and gain using feedback theory for the main feedback path only. R 1 R 3 R 4 R 5 R 6 R 7 R 8 C 2 C 3 C 4 C 1 10 F μ 150k 15k 2.7k 4.7k 1k 1k 47k 47 10 F μ 10 F μ 47 F μ V CC v O R 2 r π =1k , β f =100, r o = ∞Ω. In order to complete this problem answer the following short questions before embarking on the feedback analysis. 1. What is the purpose of each component? 2. Indicate the main feedback path and the other three minor feedback paths.
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Unformatted text preview: Once you have determined the main feedback, you will need to do the following, 3. What type of feedback it is and what the signal at the input and output are. 4. Draw the small signal equivalent circuit under a.c. conditions at mid-frequency. 5. Equate the feedback network with its two port equivalent to determine R X , R Y and β . 6. Determine open loop parameters R i , R o and A. 7. Determine the closed loop parameters R if , R of and A f ....
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