Feedback practice problems
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An amplifier used in a feedback system has a nominal open-loop gain of A = 200. In a batch of amplifiers, the variance of the open-loop gain is known to be ±60%. The feedback network used has nominal factor of β = 0.1429. The variance of the feedback factor is ±1%. If we build 50000 versions of the closed-loop circuits using the imperfect amps and the imperfect feedback networks, what are the minimum and maximum values for closed-loop gains that we would expect to see?