GATE EC 2017 Question Paper (05-Feb-2017) (Shift 1)

For a narrow base PNP BJT, the excess minority carrier concentrations (Δn${}_E$ for emitter, Δp${}_B$ for base, Δn${}_C$ for collector) normalized to equilibrium minority carrier concentrations (n${}_{E0}$ for emitter, p${}_{B0}$ for base, n${}_{C0}$ for collector) in the quasi-neutral emitter, base and collector regions are shown below. Which one of the following biasing modes is the transistor operating in?

For the operational amplifier circuit shown, the output saturation voltages are ± 15V. The upper and lower threshold voltages for the circuit are, respectively.

A good transconductance amplifier should have

The Miller effect in the context of a Common Emitter amplifier explains

In the latch circuit shown, the NAND gates have non-zero, but unequal propagation delays. The present input conditions is: P = Q = ‘0’. If the input conditions is changed simultaneously to P = Q = ‘1’, the outputs X and Y are