Start learning →

For an inverting amplifier with input resistor R1 and feedback resistor Rf, the closed-loop voltage gain is which?

AA_v = +Rf/R1
BA_v = -Rf/R1
CA_v = R1 + Rf always
DA_v = R1/Rf with minus sign
Answer & Solution
Correct answer: B. A_v = -Rf/R1
Inverting config: virtual ground at V-, so I1 = Vin/R1 = -Vout/Rf ⟹ Vout/Vin = -Rf/R1. Independent of op-amp open-loop gain.
Practise this question with Quill — GATE ECE →

Keep practising Gateece Analog

Browse all Gateece Analog questions for GATE ECE, or explore more Electronics topics.

Start a Gateece Analog lesson →
Related questions
In a bandgap voltage reference (Widlar topology), the output voltage equals which expressiA Wien-bridge oscillator using identical R and C in the frequency-selective branch oscillaThe slew rate of an op-amp limits which signal characteristic?