GATE 2026 EC – Question 62
Consider an ideal OP-AMP circuit as shown in the Figure. The resistances $R_1=R_2=R_3=R_4=50$ kΩ. The magnitude of the closed loop gain is ________. (rounded off to two decimal places)
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Correct answer: 2.98 to 3.02
Explanation
For the T feedback network, $A_v=-\frac{R_2+R_3+R_2R_3/R_4}{R_1}=-(1+1+1)=-3$. The magnitude is 3.00.