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GATE 2022 Toppers Quiz -6

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Question 1

The minimum number of 2-input NAND gates required to implement a 2-input XOR gate is

Question 2

, the energy per bit of a binary digital signal, is 10^–6 watt–sec and the one–sided power spectral density of the white noise, N₀ = 10^–5‑ W/Hz, then the output SNR of the matched filter is

Question 3

A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

Question 4

Choose the correct one from among the alternatives A, B, C, D after matching an item in Group 1 with the most appropriate item in Group 2.
Group 1
P- Ring modulator
Q- VCO (Voltage Controlled Rectifier)
R- Foster–Seely discriminator
S- Mixer
Group 2
1- Clock recovery
2- Demodulation of FM
3- Frequency conversion
4- Summing the two inputs
5- Generation of FM
6- Generation f DSB–Sc

Question 5

A p-n step junction diode with a contact potential of 0.65 V has a depletion width of 1μm at equilibrium. The forward voltage (in volts, correct to two decimal places) at which this width reduces to 0.6μm is _________.

Question 6

In the circuit shown below, the op-amp is ideal, the transistor has

and

. Decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op-amp.

Question 7

The circuit given below was at steady state at t = 0^– with switch at position 1. At t = 0, switch is moved to position 2. At t = 0⁺ voltage across coil is 120 V.

The time taken for 90% of energy stored in inductor to be dissipated is _______ msec.

Question 8

The complex integration would evaluate to

, where C is a curve defined by |Z| = 2.

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ESE & GATE EC General

Dec 17ESE & GATE EC