Loop filters play an important role in removing any sort of unwanted components with high frequency which might pass out of the phase detector and appear in the voltage controlled oscillator tune line. They would then appear as spurious signals on the output of the VCO.
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Loop filters play an important role in removing any sort of unwanted components with high frequency which might pass out of the phase detector and appear in the voltage controlled oscillator tune line. They would then appear as spurious signals on the output of the VCO.