Question
I have purchased an AD8302 evaluation board and am looking to use it to detect
a phase difference of the incoming signals. Is it possible to tell the
difference between a positive and negative phase difference as as far as I can
see they will both always give the same voltage.
Answer
Attached is one way of detecting positive or negative phase difference:
basically using two AD8302's to make a 360 degree phase detector.
Another way to do it is with an IQ demodulator (also attached).