GATE ECE year:2017 PYQs & Answers — Page 4

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Questions 31–40 of 130. Imported answers require independent review unless marked reviewed.

Topic practice 130 questionsPage 4 of 13

The clock frequency of an 8085 microprocessor is 5 MHz. If the time required to execute an instruction is 1.4 μs, then the number of T-states needed for executing the instruction is

Your answerChoose one option.

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Consider the circuit shown in the figure.

Diagram for Electronics and Communication Engineering question 16

The Boolean expression

implemented by the circuit is

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Consider the D-Latch shown in the figure, which is transparent when its clock input CK is high and has zero propagation delay. In the figure, the clock signal CLK1 has a 50% duty cycle and CLK2 is a one-fifth period delayed version of CLK1. The duty cycle at the output of the latch in percentage is

Diagram for Electronics and Communication Engineering question 17

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In a DRAM,

Your answerChoose one option.

periodic refreshing is not required

information is stored in a capacitor

information is stored in a latch

both read and write operations can be performed simultaneously

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The open loop transfer function

where

is an integer, is connected in unity feedback configuration as shown in the figure.

Diagram for Electronics and Communication Engineering question 18

Given that the steady state error is zero for unit step input and is 6 for unit ramp input, the value of the parameter

is __________.

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For the system shown in the figure,

________.

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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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GATE ECE year:2017 PYQs

Question 16

Question 16

Question 17

Question 17

Question 18

Question 18

Question 19

Question 19

Question 20

Question 20