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FM demodulation

Started by ksridhar May 16, 2006
i came to know that FM demodulation can be done through envelope detection.
i have implemented the FM demodulation using envelope detection
and i was unable to detect the original signal.
i have not implemented the limiter circuit for this.
i have passed the FM signal directly to the BPF followed by differentiator
and envelope detector
how to implement the limiter circuit.
please help me.


"ksridhar" <ksridhar_7@yahoo.co.in> wrote in message
news:B4adnSYr9JjrUvTZRVn-qg@giganews.com...
> i came to know that FM demodulation can be done through envelope
detection.
> i have implemented the FM demodulation using envelope detection > and i was unable to detect the original signal. > i have not implemented the limiter circuit for this. > i have passed the FM signal directly to the BPF followed by differentiator > and envelope detector > how to implement the limiter circuit. > please help me. > >
Limiter circuits are normally amplifiers with high gain leading to saturation. This is followed by a band-pass filter. A high-bandwidth op-amp would work (no feedback) though you could obtain a specialist IC for the purpose. M.P *** Posted via a free Usenet account from http://www.teranews.com ***