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AD8302 Phase Error Measurement

Question asked by zhang13579 on Nov 24, 2015
Latest reply on Dec 2, 2015 by zhang13579

Hi everybody,

   Recently I have set up a circuit to detect the phase error between the two signal,but no matter how I change the phase error of the input signal,the voltage of Vphs pin is constant about 0.9V rather than a linear change,I'd like to know what happened.

   The basic condition of my circuit is as follows:



    The frequency of input signal is 500Hz,Vpp of the two sine signal is 10V

    Thank you very much for your help!