I have an FM signal: 200 mVpp, 11.5 MHz carrier, max deviation - 500 kHz, modulating signal frequency range is 40-10000 Hz. And I need to demodulate it with highest SNR possible.
The circuit has to be low voltage (3.3V or lower), low power and low profile (<4mm, so no large inductors or transformers). What are the best ways to demodulate the signal? I've found this circuit (autodyne frequency converter and pulse counter), it has very low power consumption, can be made in low profile and doesn't require much tuning, which is also great, but I'm not sure about it's noise performance. I also think about multiplying signal frequency 4-5 times with PT7C4511 clock multiplier and then demodulating it with TLC2933 PLL.
UPD: I've found an interesting patent which claims low noise demodulation. What do you think?