GATE EE 2025 Set 1 — Question 56
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Analog & Digital Electronics → Operational Amplifiers → Ideal & Non-Ideal Op-Amp
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Question
The op-amps in the following circuit are ideal. The voltage gain of the circuit is ____ (round off to the nearest integer).
Correct answer
2 to 2
Solution
The circuit consists of two operational amplifier stages. Let the input voltage be , where and are the voltages at the non-inverting terminals of the first and second op-amps, respectively.
1.First Stage (Left Op-amp): This is a non-inverting amplifier configuration. The output of the first op-amp, , is given by:
2.Second Stage (Right Op-amp): The second op-amp acts as a combination of a non-inverting amplifier for and an inverting amplifier for . Using the principle of superposition:
3.Total Gain: Substituting into the equation for :
Therefore, the voltage gain .Continue learning with Success Tracker
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