Question: A feedback amplifier is needed which has an R _ ( it ) > = 1 M Omega and an R _ ( of
A feedback amplifier is needed which has an RitMOmega and an RofOmega The opamp
which has the equivalent circuit shown below is available for the application.
a Briefly explain why seriesshunt is the required feedback topology.
b As necessary convert the equivalent circuit of the opamp to the proper equivalent
circuit for the type of feedback topology needed for this application.
c What should be the value of the resistor Rf Use the feedback circuit shown next to the
opamp equivalent circuit below.
d What is the value of the closed loop gain and the closed loop input resistance Rir?
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