GATE Analog Electronics: Diodes and transistor circuits – Previous Year Questions
15 GATE previous year questions on Diodes and transistor circuits (Analog Electronics, Instrumentation Engineering) with answers and explanations, from every paper.
- GATE 2021 IN Q25 – Transistors Q 1,Q 2 have current gains 1=99, 2=49, respectively. For the shown circuit, current I B2 is μA.
- GATE 2021 IN Q58 – All transistors shown are matched with current gain =20. Neglect the Early effect. Current I o4 is mA.
- GATE 2022 IN Q31 – A Zener diode is used as a 4 V regulator in the circuit shown. It needs minimum current 4 mA for regulation. The maximum load current through R L is…
- GATE 2022 IN Q36 – The shown V in(t) is applied from t=0 ms to 6 ms to the circuit. The capacitor initially has 0.3 V and the diode is ideal. The open-circuit V out at 5…
- GATE 2022 IN Q44 – The enhancement n-channel MOSFET in the small-signal circuit is saturated with transconductance g m. Ignore channel-length modulation. The…
- GATE 2022 IN Q47 – The enhancement n-channel MOSFET shown is saturated with transconductance g m. A low-frequency small-signal supply voltage v d causes output…
- GATE 2022 IN Q58 – In the circuit shown, R 1=100 k and R 2=1 k. The npn BJT has base–emitter voltage 0.7 V and collector–emitter voltage 5.2 V. Its current gain is (two…
- GATE 2023 IN Q33 – The diode shown is ideal and the source is i s(t)=(3000 t) mA. The magnitude of average current through resistor R is mA (two decimal places).
- GATE 2023 IN Q56 – The nMOS feedback amplifier shown has nC ox=1 mA/V2, threshold V T=1 V, and W/L=2. The drain bias voltage is 4 V. Capacitors C have zero…
- GATE 2024 IN Q23 – Consider the circuit shown. The CMOS digital logic has infinite input impedance and the opamp is ideal. A 1.8 V Zener diode requires a minimum Zener…
- GATE 2024 IN Q24 – The figure shows an NMOS amplifier. The transistor operates in saturation with n C ox=250\ A/ V2, V T=0.65 V, and W/L=4. Neglect channel-length…
- GATE 2025 IN Q35 – In the shown circuit, assume very high BJT current gain , V BE=0.7 V, and Zener voltage V Z=4.7 V. The LED current I is mA (rounded to two decimal…
- GATE 2026 IN Q21 – A common gate amplifier represents a .
- GATE 2026 IN Q22 – In the circuit shown, the BJT has =100. The base-emitter junction voltage is 0.65\ V. The quiescent collector current I C is mA.
- GATE 2026 IN Q34 – In the circuit below, the maximum value of v out is V. (Rounded off to the nearest integer.)