Re: Fm/ Am
An interesting problem.
From what I know, if conventional Demodulation techniques are used for demodulating AM and FM, the demodulation of one Modulation results in the loss of the other modulation technique. This eliminates cascading demodulation techniques.
Therefore, both Modulations should be de-modulated at the same time, by feeding the same signal to both the demodulating circuits.
for eg:
1) Use an Amplitude detector (low pass filter) for Amplitude Demodulation
2) A Phase Shift Detector or any other Frequency demodulation techniques.