1) Which among the following parameters is/are decided by the front-end of a receiver?
a. Sensitivity
b. Bandwidth
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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2) Which nature of charge carriers give rise to the current fluctuations thereby resulting into the generation of shot noise?
a. Continuous
b. Discrete
c. Sampled
d. All of the above
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Answer
Explanation
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ANSWER: Discrete
Explanation:
No explanation is available for this question!
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3) On which factor/s do/does the response time of photodiode depend/s?
a. Diffusion time of photo carriers outside the depletion region
b. Diffusion time of photo carriers within the depletion region
c. RC time constant
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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4) In an eye-diagram, digital signals with very bad interference resembles the shape of _____
a. circle
b. rectangle
c. triangle
d. straight line
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Answer
Explanation
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ANSWER: straight line
Explanation:
No explanation is available for this question!
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5) Which among the following are the disadvantages of an optical feedback transimpedance receiver?
A. Increase in receiver input capacitance
B. Increase in dark current
C. Decrease in receiver input capacitance
D. Decrease in dark current
a. A & B
b. C & D
c. A & D
d. B & C
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Answer
Explanation
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ANSWER: A & B
Explanation:
No explanation is available for this question!
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6) In high impedance preamplifier, how are the noise sources kept to minimum level?
a. By reducing dark current with proper selection of photodiode
b. By reducing thermal noise of biasing resistor
c. By using high impedance amplifier
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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7) Which type of preamplifier plays a crucial role in reducing the effect of thermal noise?
a. Low Impedance Pre-amplifier
b. High Impedance Preamplifier
c. Transimpedance Preamplifier
d. None of the above
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Answer
Explanation
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ANSWER: High Impedance Preamplifier
Explanation:
No explanation is available for this question!
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8) Which feature of an eye-diagram assists in the measurement of additive noise in the signal?
a. Eye opening (height, peak to peak)
b. Eye overshoot/ undershoot
c. Eye width
d. None of the above
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Answer
Explanation
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ANSWER: Eye opening (height, peak to peak)
Explanation:
No explanation is available for this question!
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9) In digital receivers, which codes are used to designate the sampled analog signals after their quantization into discrete levels?
a. Binary
b. Decimal
c. ASCII
d. Excess-3
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Answer
Explanation
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ANSWER: Binary
Explanation:
No explanation is available for this question!
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10) Which component of an optical receiver is a linear frequency shaping filter used for the compensation of signal distortion and Inter Symbol Interference (ISI)?
a. Photodetector
b. Amplifier
c. Equalizer
d. None of the above
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Answer
Explanation
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ANSWER: Equalizer
Explanation:
No explanation is available for this question!
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