The phase detector in a PLL is followed by a low- pass filter. The low- pass filter passes the _______and rejects all other frequencies.
A)difference of the input and feedback signals
B)input signal
C)feedback signal
D)sum of the input and feedback signals

Question

Quizplus · Accepted Answer

The low-pass filter in a Phase-Locked Loop (PLL) passes the difference frequency component (error signal) generated by the phase detector, which is the difference of the input and feedback signals. This allows the PLL to adjust and lock onto the phase of the input signal.

The Phase Detector in a PLL Is Followed by a Low-