In a three stages cascaded amplifier has the following specifications the gains are AVNL1=-10, AVNL2=-5 and AVNL3 +6, Input impedances Z₁-5K 0, Z₂=10K Q and Z3-25KQ, Output impedances Zo1= 1000, Zoz-5000, Zo3-1KQ respectively. Calculate the total voltage gain AVLT, input impedance and output impedance of the overall system.

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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.