Monolithic Phase-Locked Loop MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Monolithic Phase-Locked Loop”.

1. Given fo = 1.2kHz and V = 13v, find the lock-in range of monolithic Phase-Locked Loop.
a) ±575Hz
b) ±720Hz
c) ±150Hz
d) ±1kHz

2. Find out the incorrect statement.
Monolithic phase detector is preferred for critical applications as it is:
1. Independent of variation in amplitude
2. Independent of variation in duty cycle of the input waveform
3. Independent of variation in response time
a) 1 & 2
b) 1 & 3
c) 2 & 3
d) 1, 2 & 3

3. At what range the PLL can maintain the lock in the circuit?
a) Lock in range
b) Input range
c) Feedback loop range
d) None of the mentioned

4. Determine the capture range of IC PLL 565 for a lock-in range of ± 1kHz.

Determine the capture range of IC PLL 565 for a lock-in range of ± 1kHz

a) △fc = ±31.453Hz
b) △fc = ±66.505Hz
c) △fc = ±87.653Hz
d) None of the mentioned

5. What is the conversion ratio of the phase detector in 565 PLL?
a) 0.14
b) 0.35
c) 0.4458
d) 0.7

6. Find the lock-in range of monolithic Phase-Locked Loop from the given diagram.

Find the lock-in range of monolithic Phase-Locked Loop from the given diagram

a) -fo-△fL to fo-△fL
b) -fo-△fL to -fo-△fC
c) fo-△fL to fo-△fC
d) -fo-△fC to fo-△fC

7. At which state the phase-locked loop tracks any change in input frequency?
a) Free running state
b) Capture state
c) Phase locked state
d) All of the mentioned

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