AM demodulation

Thread Starter


Joined Jan 26, 2012
I want use the DSP that I have (TMS320F28335) for doing the AM demodulation. In fact I am using an LVDT that is excited with a sinewave and its output is a sinewave AM modulated.

I have already provided the primary sinewave signal using the PWM.

Now I have to use the ADC for digitalize the secondary output.
The input signal that I have adjusted with an analog interface is a sinewave centered in 1.65V (the ADC input goes from 0 to 3.3V) and amplitude modulated, with a phase shift with the primary signal.

How could I efficiently reveal the phase shift before doing the multiply of the two signals?