AM demodulation

Discussion in 'Embedded Systems and Microcontrollers' started by guerrez, Feb 12, 2012.

  1. guerrez

    Thread Starter New Member

    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?