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1. An amplifier has input impedance of 4 kΩ and output impedance of 80 kΩ. It is used in negative feedback circuit with 10% feedback. If open loop gain is 90, the closed loop input and output impedances are





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  • By: guest on 01 Jun 2017 11.43 pm
    Closed loop input impedance = 4 (1 + 0.1 x 90) = 40 kΩ, Closed loop Output impedance = = 8 kΩ.
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