Explanation: The output frequency(fo) of VCO is identical to input frequency(fs) except for a finite phase difference(φ), which generates a corrective control voltage to shift VCO frequency from fo to fs, thereby maintains the lock once locked and PLL tracks the frequency changes of the input signal. 7. 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
Answer:A
Explanation: The output frequency(fo) of VCO is identical to input frequency(fs) except for a finite phase difference(φ), which generates a corrective control voltage to shift VCO frequency from fo to fs, thereby maintains the lock once locked and PLL tracks the frequency changes of the input signal. 7. 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
Explanation: The change in frequency of the incoming signal can be tracked when the PLL is locked. So, the range of frequencies over which PLL maintains the lock with the incoming signal is called as the lock in range. 8. The pull-in time depends on