Question

2. A designer is considering two possible designs of a feedback amplifier. The goal is to get a closed- loop gain of A, 20 V/V. One design employs an amplifier for which A- 500 V/V; the other uses an amplifier with the open-loop gain A 250 V/N Find B and the desensitivity factor in both cases. If the A-500 V/V amplifier unit has a gain uncertainty of ±10%, what is the gain uncertainty for the closed-loop amplifiers utilizing this amplifier? If the same closed-loop gain uncertainty is to be achieved with the case with A = 250 V/V amplifier, what is the maximum allowable uncertainty of its open-loop gain?

Answer 1

The eapession ampli-fier OY .p Ap - 20 20 300 β = 0.043" 良0 52 S 2SU = 0.046

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