Official PYQ · 2022Set 1 · Q49BJT and MOSFET AmplifiersNAT2 marks

GATE EC 2022 Set 1 Q49 — BJT and MOSFET Amplifiers

Consider the circuit shown with an ideal long channel $n \text{MOSFET}$ (enhancement-mode, substrate is connected to the source). The transistor is appropriately biased in the saturation region with $V_{GG}$ and $V_{DD}$ such that it acts as a linear amplifier. $v_{i}$ is the small-signal ac input voltage. $v_{A}$ and $v_{B}$ represent the small-signal voltage at the nodes $\text{A}$ and $\text{B},$ respectively. The value of $\dfrac{v_{A}}{v_{B}}$ is _____________ (rounded off to one decimal place).

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Answer: -2.1:-1.9

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Published 10 Oct 2026

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