GATE ECE topic:communication-engineering PYQs & Answers — Page 22

Home
GATE
Electronics and Communication Engineering
Topics
topic:communication-engineering

Questions 211–220 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 22 of 72

In a semiconductor, if the Fermi energy level lies in the conduction band, then the semiconductor is known as

Your answerChoose one option.

degenerate n-type.

degenerate p-type.

non-degenerate n-type.

non-degenerate p-type.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

For an intrinsic semiconductor at temperature

, which of the following statement is true?

Your answerChoose one option.

All energy states in the valence band are filled with electrons and all energy states in the conduction band are empty of electrons.

All energy states in the valence band are empty of electrons and all energy states in the conduction band are filled with electrons.

All energy states in the valence and conduction band are filled with holes.

All energy states in the valence and conduction band are filled with electrons.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A series

circuit has a quality factor

of 1000 at a center frequency of

. The possible values of

and

are

Your answerChoose one option.

and

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

For a MOS capacitor,

and

are the flat-band voltage and the threshold voltage, respectively. The variation of the depletion width (

) for varying gate voltage (

) is best represented by

Your answerChoose one option.

Diagram for Electronics and Communication Engineering question 19

Diagram for Electronics and Communication Engineering question 19 (figure 2)

Diagram for Electronics and Communication Engineering question 19 (figure 3)

Diagram for Electronics and Communication Engineering question 19 (figure 4)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Consider a narrow band signal, propagating in a lossless dielectric medium (

), with phase velocity

and group velocity

. Which of the following statement is true? (

is the velocity of light in vacuum.)

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In the circuit shown below,

and

are bias voltages. Based on input and output impedances, the circuit behaves as a

Diagram for Electronics and Communication Engineering question 21

Your answerChoose one option.

voltage controlled voltage source.

voltage controlled current source.

current controlled voltage source.

current controlled current source.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A cascade of common-source amplifiers in a unity gain feedback configuration oscillates when

Your answerChoose one option.

the closed loop gain is less than 1 and the phase shift is less than 180°.

the closed loop gain is greater than 1 and the phase shift is less than 180°.

the closed loop gain is less than 1 and the phase shift is greater than 180°.

the closed loop gain is greater than 1 and the phase shift is greater than 180°.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In the circuit shown below, P and Q are the inputs. The logical function realized by the circuit shown below is

Diagram for Electronics and Communication Engineering question 23

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The synchronous sequential circuit shown below works at a clock frequency of 1 GHz. The throughput, in Mbits/s, and the latency, in ns, respectively, are

Diagram for Electronics and Communication Engineering question 24

Your answerChoose one option.

1000, 3

333.33, 1

2000, 3

333.33, 3

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The open loop transfer function of a unity negative feedback system is

, where

and

are positive constants. The phase crossover frequency, in rad/s, is

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE ECE topic:communication-engineering PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25