PLL Part 2. How Phase Locked Loop (PLL) Works: Sinusoidal vs. Square Phase Detector.

Phase Locked Loop
• PLL Part 1. Phase Lock...
A phase detector, also called a phase comparator, compares two waveforms and the output of the phase detector is a representation of the phase difference of the signals. There are two basic types of phase detectors: sinusoidal phase detectors and square signal phase detectors, which operate either in binary mode or by detecting zero crossings. The phase detector produces a series of output pulses whose width is proportional to the phase difference.

[@HighField-qr6bl]

Keen on all things explaining how communications technologies work - from the ground up.

[@technologiesdiscussion1676]

I am from Comm background. :)
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[@HighField-qr6bl]

Phase Comparator looks like a mixer, then some logic gate to ask if there is output at all as a difference signal - then the feedback function. When lock is not there yet there is also a need to freeze user attempts to retune the output a the VCO needs to be allowed to provide feedback in a stable way.

[@technologiesdiscussion1676]

Is XOR. U are an expert! :)
Not enough time for me to go so deep yet. Maybe u can help to contribute. :)