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GATE EC 2020: Analog Quiz 2 (App update required to attempt this test)

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Question 1

For common emitter input characteristics is 6V and is changed from 0.32 to 0.8V also base current changes from 40μA to 60μA, then by using the given data calculate the input impedance (in KΩ ) kept constant.

Question 2

Determine the 3- dB frequency of short- circuit current gain of a bipolar transistor with

Question 3

A quick-charge mobile charger prototype has to deliver a power of 15 W to a cellphone. The cellphone draws current at 5 V from charger which is connected to mains of 220 V AC at 50 Hz. However, while designing the charger, ripple voltage was specified to be restricted at 0.2 V, instead 0.5 V ripple voltage was observed during its operation. Determine the value of capacitance (in mF) to be connected in parallel to the existing capacitor filter in rectifier circuit to correct the designing mistake.

Question 4

Consider the circuit shown below:-

If diode has drop of 0.25V at DC and η = 2, find average value of Vo.

assume (VT = 26 mV)

Question 5

The value of R for which PMOS transistor in figure will be biased in linear region is

Question 6

Determine the voltage gain for the given network, if the equivalent model of the transistor is given as: is very large.
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Aug 10ESE & GATE EC