Consider the op-amp circuit shown in Fig. 1, where the op amp has infinite input resistance and zero output resistance but finite open- loop gain A. a) If R1 = 10 k2, find R2 that results in Ar = 10 V/V, for the open loop gain A = 1000 V/V b) For the case in (b), find the percentage change in At that results when A decreases by 20%. Comment on the results. V, R2 R1 Figure 1

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Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.