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Exam Questions Papers

Q1:

Input and output impedance with feedback for voltage series feedback having A = -200, R1 = 10 kΩ, R0 = 50 kΩ and feedback factor β = -0.2 will be

A 410 kΩ, 2050 kΩ

B 410 kΩ, 1.219 kΩ

C ≈ 0.243 kΩ, 2050 kΩ

D ≈ 0.24 kΩ, 1.219 kΩ

ANS:B - 410 kΩ, 1.219 kΩ

In voltage series feedback output impedance decreases, input impedance increases, , Rif = Ri(1 + Aβ).



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