When a phase- locked loop is locked, the difference frequency (fi - f0)is
A)twice the VCO frequency
B)equal to the VCO frequency
C)zero or very small
D)none of the above

Question

Quizplus · Accepted Answer

When a phase-locked loop (PLL) is locked, the difference frequency between the input frequency (fi) and the VCO (Voltage-Controlled Oscillator) frequency (f0) is zero or very small, indicating that the VCO frequency has successfully locked to the input signal frequency.

When a Phase- Locked Loop Is Locked, the Difference Frequency