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Output of gilbert cell used as a phase detector

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steinar96

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Greetings

I'm looking for discrete/ic based solutions for measuring the phase difference between current and voltage on the mains. At the moment i'm looking at the gilbert cell which i'm not very familiar with. If i'm using the gilbert cell for phase measurement does it output a linear analog signal representing the phase difference between the input sine waves.

Suggestions for other ic based solutions also appreciated.
 

I've never had to do it, but in this case I suppose a digital means is simpler, maybe with a zero crossing detector (i.e. measuring time between the zero crossings to determine the phase). I guess it would be quite convenient and simple for a microcontroller, since it is only 50/60hz.
There are all-microcontroller-based zero-crossing detectors (e.g. see **broken link removed**), or it could be opamp based, and then the output feeding a microcontroller interrupt.
 
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