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electronics and communication engineering analog electronics
1. An amplifier has open loop gain of 100, input impedance 1 kΩ and output impedance 100 Ω. If negative feedback with β = 0.99 is used, the new input and output impedances are
(A): 10 Ω and 1 Ω
(B): 10 Ω and 10 kΩ
(C): 100 kΩ and 1 Ω
(D): 100 kΩ and 10 Ω
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By: guest on 01 Jun 2017 11.43 pm
Input impedance with feedback = (1 kΩ) (1 + 100 + 0.99) = 100 kΩ. Output impedance with feedback = .
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