frequency modulation circuit

[PratapKollu]

HI
Dear Members

I wish to design a FM circuit(mixer) as follows

1) two frequencies that I use are 1 KH and 250 Hz
The FM circuit will have a output contains 250Hz 750 Hz, 1kHz and 1.25 KHz
FFT of Output is shown in attachment

2) A circuit that can extract the 750 Hz signal
3) Another circuit extracting the 1.25 Khz signal

Please help me out.

Thanks and regards
Pratap

 

[PratapKollu]

can some one suggest me model circuit...for example

 

[RCinFLA]

Looks like you have cross modulation of the 250 Hz and 1000 Hz two tone modulation..

Anyway, two active bandpass filters on FM demodulator.