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GATE 2022 Rapid Revision Quiz 9

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Question 1

Which of the following is true?

Question 2

The components in the circuit shown below are ideal.

If the Op-amp is in positive feedback and the input voltage V_i is a sine wave of amplitude 1V, V₀ = ?

Question 3

A signal of bandwidth 100 MHz and strength 10mW is transmitted through a transmitter through a cable that has 40 dB loss. If

then the signal to noise ratio at the input of the receiver is

Question 4

Nd = 10¹⁶/cm³

V_T = 26mV

D_n = 35.1 cm²/s

D_p = 12.48 cm²/s

n_i = 1.5 × 10¹⁰/cm³

A = 1 nm²

Find the minority carries in N-Type semiconductor in length of semiconductor is 2nm?

Question 5

The maximum power that can be transferred to the load resistor R_L from the voltage source in figure is

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Question 6

For a double hetero junction LED emitting light at a peak wavelength of 1.3 μm has radiative and non-radiative recombination time as 40 nsec and 120 nsec respectively, then the bulk recombination lifetime will be

Question 7

An MOS-Cap has boron dopping concentration of 10¹⁵/cm³ in substrate. When a gate voltage is applied, a depletion region of width 0.5 μm is formed with surface potential of 0.2 V.

Given that ϵ_r of S_i = 12 and of S_io2 = 4, then the peak electric field (V/μm) in oxide region is?

Question 8

A LTI system is described by the following difference equation:-

y(n) = ay (n — 1) + bx (n), 0 < a < 1

The value of ‘b’ in terms of ‘a’, such that the maximum value of |H(e^jω)| is unity.

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