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GATE 2022 Toppers Quiz 19

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Question 1

The time domain behavior of an RL circuit is represented by

For an initial current of , the steady state value of the current is given by

Question 2

The minimum sampling frequency (in samples/sec) required to reconstruct the following signal from its samples without distortion.
would be:

Question 3

A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate as

Question 4

One of a loss-less transmission line having the Characteristic Impedance of 75Ω and length of 1cm is short-circuited. At 3GHz, the input impedance at the other end of the transmission line is

Question 5

A regulated power supply, shown in figure below has an unregulated input (UR) of 15 Volts and generates a regulated output Vout. Use the component values shown in the figure.

In the figure above, the ground has been shown by the symbol.
The power dissipation across the transistor Q1 shown in the figure is:

Question 6

Consider the system shown below:

D is a delay block of 1 unit. What is the impulse response of the cascaded system?

Question 7

In the circuit shown in the figure below, find the power (maximum) absorbed by the load resistor RL is ______ (in watts).

Question 8

An ideal n–channel MOSFET has the following parameters : mobility of electrons = 500 cm2 /V–sec, threshold voltage VTN = 0.6V and oxide thickness tox = 200Å. The MOSFET is biased in the saturation region at VGS = 5 V to get the saturation drain current (ID (sat)) of 6 mA, the required aspect ratio is _______________.

(Assume that the permittivity of oxide layer is 34.5 × 10–14 F/ cm)

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Dec 31ESE & GATE EC