GATE ECE topic:electronics PYQs & Answers — Page 63

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Questions 621–630 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 63 of 72

For the system shown in the figure,

________.

Diagram for Electronics and Communication Engineering question 18

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Consider a stable system with transfer function

where

and

are real valued constants. The slope of the Bode log magnitude curve of

converges to

dB/decade as

. A possible pair of values for

and

Your answerChoose one option.

and

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Consider the state space realization

where

denotes the unit step function. The value of

is ________.

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Which of the following can be the pole-zero configuration of a phase-lag controller (lag compensator)?

Your answerChoose one option.

Diagram for Electronics and Communication Engineering question 20

Diagram for Electronics and Communication Engineering question 20 (figure 2)

Diagram for Electronics and Communication Engineering question 20 (figure 3)

Diagram for Electronics and Communication Engineering question 20 (figure 4)

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Which of the following statements is incorrect?

Your answerChoose one option.

Lead compensator is used to reduce the settling time.

Lag compensator is used to reduce the steady state error.

Lead compensator may increase the order of a system.

Lag compensator always stabilizes an unstable system.

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Let

be independent random variables.

has mean 0 and variance 1, while

has mean 1 and variance 4. The mutual information

between

and

in bits is ________.

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Which one of the following graphs shows the Shannon capacity (channel capacity) in bits of a memoryless binary symmetric channel with crossover probability

Your answerChoose one option.

Diagram for Electronics and Communication Engineering question 21

Diagram for Electronics and Communication Engineering question 21 (figure 2)

Diagram for Electronics and Communication Engineering question 21 (figure 3)

Diagram for Electronics and Communication Engineering question 21 (figure 4)

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Which one of the following statements about differential pulse code modulation (DPCM) is true?

Your answerChoose one option.

The sum of message signal sample with its prediction is quantized

The message signal sample is directly quantized, and its prediction is not used

The difference of message signal sample and a random signal is quantized

The difference of message signal sample with its prediction is quantized

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Consider the random process

where

is a zero-mean Gaussian random variable and

is a random variable uniformly distributed between 0 and 2. Assume that

and

are statistically independent. The mean value of the random process at

is __________

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In a digital communication system, the overall pulse shape

at the receiver before the sampler has the Fourier transform

. If the symbols are transmitted at the rate of 2000 symbols per second, for which of the following cases is the inter symbol interference zero?

Your answerChoose one option.

Diagram for Electronics and Communication Engineering question 23

Diagram for Electronics and Communication Engineering question 23 (figure 2)

Diagram for Electronics and Communication Engineering question 23 (figure 3)

Diagram for Electronics and Communication Engineering question 23 (figure 4)

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GATE ECE topic:electronics PYQs

Question 18

Question 19

Question 19

Question 20

Question 20

Question 21

Question 21

Question 22

Question 22

Question 23