GATE EC 2016 Question Paper (31-Jan-2016) (Shift 1)

The Ebers-Moll model of a BJT is valid

A long-channel NMOS transistor is biased in the linear region with ${\mathrm{V}}_{\mathrm{DS}}=50\mathrm{mV}$ and is used as a resistance. Which one of the following statements is NOT correct?

Assume that the diode in the figure has Vₒₙ = 0.7 V, but is otherwise ideal.



The magnitude of the current i₂ (in mA) is equal to ________

Resistor R₁ in the circuit below has been adjusted such that I₁ = 1 mA. The bipolar transistors Q₁ and Q₂ are perfectly matched and have very high current gain, so their base currents are negligible. The supply voltage V${}_{CC}$ is 6 V. The thermal voltage kT/q is 26 mV.



The value of R₂ (in Ω) for which I₂ = 100 μA is ________

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?