GATE Analog and Digital Electronics: Operational Amplifiers – Previous Year Questions
12 GATE previous year questions on Operational Amplifiers (Analog and Digital Electronics, Biomedical Engineering) with answers and explanations, from every paper.
- GATE 2020 BM Q38 – For Vᵢₙ=10sin(2πt) applied to the circuit shown, which output waveform results? Both op-amps have ±12 V supplies. The second stage contains 100 kΩ,0.2…
- GATE 2021 BM Q43 – All op-amps in the shown circuit are ideal with infinite gain and bandwidth. Find Vout/Vin.
- GATE 2021 BM Q61 – The shown op-amp has ±10 V supplies. Its non-inverting node connects to ground through 2R and output through R; its inverting node connects to +10 V…
- GATE 2022 BM Q41 – The op-amp/resistor/capacitor filter shown uses ideal op-amps with infinite gain and bandwidth. What R₂ in kΩ makes Vₒ(s)/Vᵢ(s) all-pass?
- GATE 2022 BM Q57 – The shown ideal op-amp has infinite gain and bandwidth and ±10 V supplies. Inputs 0.1 V and 1 V connect via 1 kΩ to the inverting and non-inverting…
- GATE 2023 BM Q19 – In the shown ideal-op-amp circuit, the parallel-plate capacitance is C= A/x, where ε is dielectric permittivity, A is plate area and x=x 0+kt is plate…
- GATE 2023 BM Q51 – For the shown ideal-op-amp circuit, which properties are true? The inverting terminal is grounded and the output is fed directly to the non-inverting…
- GATE 2025 BM Q15 – The ideal op-amp circuit shown is driven by Vin=1 V and powered by ±15 V rails. Find Vout in volts.
- GATE 2025 BM Q52 – Find the ideal summing op-amp output shown, in volts to the nearest integer. Inputs are 2 V through 5 kΩ, 2 V through 4 kΩ, 1 V through 2 kΩ; feedback…
- GATE 2025 BM Q54 – The oscillator shown has R=1 kΩ,R1=2 kΩ,R2=6 kΩ,C=0.1 μF. Find its oscillation frequency in kHz, to two decimal places.
- GATE 2026 BM Q48 – For the ideal op-amp circuit shown, find input impedance looking into Vin.
- GATE 2026 BM Q55 – In the ideal instrumentation amplifier shown, one input-stage feedback resistor R* differs slightly from the other input-stage resistors R. Which…