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Operational Amplifiers

Q1:
mcq18_1012.gifDecreasing the gain in the given circuit could be achieved by

A reducing the amplitude of the input voltage

B increasing the value of the feedback resistor

C increasing the value of the input resistor

D removing the feedback resistor

ANS:C - increasing the value of the input resistor

Acctually the diagram is in inverting configuration. So it has gain equation Gain= -Rf/Rin. It means gain inversly proportional to Rin. Therefore answer is C.



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