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GATE EC 2021 Set 1 — Question 20

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MCQ+1 / -0.33EasySumming & DifferenceOp-Amp CircuitsAnalog Circuits

Analog Circuits → Op-Amp Circuits → Summing & Difference

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Question

Consider the circuit with an ideal OPAMP shown in the figure.
OPAMP circuit with resistors R, Rf and voltage sources Vin, Vref
Assuming ∣VIN∣≪∣VCC∣|V_{IN}| \ll |V_{CC}| and ∣VREF∣≪∣VCC∣|V_{REF}| \ll |V_{CC}|, the condition at which VOUTV_{OUT} equals to zero is
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