If we could eliminate the tank circuit from FM demodulator, we'll make the size of it much smaller. Here is a conceptual design of FM demodulator using the successive Fourier transform instead of tank circuit;
If the size of the tank circuit is significant then the size of the battery will also be significant. It seems that you propose to use a DSP instead of a traditional FM detector. Even assuming you can integrate a DSP, it's voltage regulator any other other peripheral parts it needs in less space than a LC tank is it going to use the same or less power?
Bob
Definitely the battery needs a considerable space for any portable devices. Apart from that problem, if that demodulator is embedded in a chip, it might be expected to mass-produce much easier than ordinal demodulators because it doesn't have to implement the tank circuit.
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