IndiaBIX

Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 15
11.
The amplitude of a random signal uniformly distributed between - 5 V and 5 V. If the positive values of the signal are uniformly quantized with a step size of 0.05 V, and the negative values are uniformly quantized with a step size of 0.10 V, the resulting signal to quantization noise is approximately
46 dB
43.8 dB
42 dB
40 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Consider the following statements:
  1. With increase in temperature Fermi-level tries to come in between the energy gap exactly at middle
  2. Mobility of electron in GaAs is very high compared to mobility of hole
  3. In LED, the light energy radiated due to recombination with the aid of traps.
Which of these statements are true?
1 and 2
1, 2 and 3
2 and 3
1 and 3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
For good quality signal transmission all frequency components should have the same transmission delay, td and same phase shift-Φs. What can be said about the statement?
Correct
True from td but not for Φs
Not true for td but true for Φs
Both td and Φs are not involved in quality
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t)

For t > 0, the voltage across the resistor is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In a CMOS CS amplifier, the active load is obtained by connecting a
p channel current mirror circuit
n channel transistor
p channel transistor
BJT current mirror
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers