A multistage amplifier employs four stages, each of which has a voltage gain of 40. The overall gain of the amplifier is approximately in dB The circuit is with an ideal operational amplifier with ± 10 V supply. The output voltage is: 1 ΚΩ 20 mVoWWW 40 mVoWWW 2 ΚΩ "It 10 ΚΩ ww Sto o Vout

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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.