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Direct conversion circuit

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booblik

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Hi,

Can anyone provide me with a simple direct conversion circuit? Or direct to some references? I need to bring down a modulated signal from ~400MHz. The bandwidth of the signal is ~1MHz.

Thanks,
 

what kind of modulatation?? FM? AM? or something other?
 

Hi,

It is amplitude modulated. The question is how to remove the carrier with a simple circuit. My thoughts were to use a low-pass filter, then an amplifier. Is this correct? Also if a low-pass filter was used, how can you tell the band-stop frequency? I know cut-off frequency can't equal the band-stop frequency.
 

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