Electronics and Communication Engineering - Exam Questions Papers

21. 

It is very likely in __________ gate family that when one gate is driving number of gates in __________ , a gate having least voltage for saturation may consume large __________ leaving other gates inoperative and this phenomenon is called __________ .

A. DTL, parallel, current, current - sinking
B. DCTL, parallel, current, current-lagging
C. ECL, series, voltage, voltage-deterioration
D. DCTL, series, current, current-lagging

Answer: Option B

Explanation:

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22. 

The unit step response of an under damped second system has steady state value of - 2. Which one of the following transfer functions has these properties?

A.
B.
C.
D.

Answer: Option B

Explanation:

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23. 

For a system with transfer function

The bandwidth of the system is (rad/sec)

A. 2.828
B. 5.2915
C. 5.088
D. cannot be determined

Answer: Option C

Explanation:

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24. 

Consider the following:

  1. Distortion
  2. Gain
  3. Bias stabilization
  4. Sensitivity
  5. Frequency response
Which of these properties of the power amplifier one should concentrate upon while designing a good power amplifier circuit?

A. 1, 2 and 3
B. 1, 3 and 5
C. 2, 3 and 4
D. 4 and 5

Answer: Option A

Explanation:

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25. 

In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.

The value of current I0 is approximately

A. 0.5 mA
B. 2 mA
C. 9.3 mA
D. 15 mA

Answer: Option B

Explanation:

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