how to measure amplitude and phase differenc between two sine signals with same frequ

[veerubiji]

how to measure amplitude and phase differenc between two sine signals with same FREQ

Hello,

I am generating one sine signal using micro controller. I don't know how much amplitude it is but i am generating sine wave with 250KHz frequency. I am giving it to Capacitive sensor. I want to measure phase difference between sensor input and output signals and as well as peak voltages of sensor input and sensor output. Is there any circuit that i can measure both signals amplitudes and phase difference? or Any method?

Thanks in advance.

 

[gehan_s]

hi veerubiji,

how about using an op amp peak detector to get the two amplitudes of the 2 sine waves ????? then you maybe can use an op amp circuit to get the difference in the two amplitudes.

 

[ard]

Or measure the time between the zero crossings of the 2 signals to get the phase; and since the frequency is constant, a reading taken one/fourth the complete cycle period after the zero crossing would give you the amplitude.