--- In [email protected], Robert McGwier <[EMAIL PROTECTED]> wrote: > Chris: > > AM is a double sidebanded signal. You didn't describe your circuit but > is it direct conversion, i.e. is the carrier at DC in your circuit? If > so, take EITHER the real or the imaginary, run it through a rectifier > and filter with a low pass that cuts off at the audio bandwidth you want > or slightly less. You will then have detected audio. > > Bob > > >
Bob, If the carrier is at DC, why would a rectifier be needed? The carrier has already been removed, low pass filtering should be sufficient. If the carrier is at 12 kHz, then simple rectification would probably give poor results as designing a diode ciricuit with the right dynamics may be impossible at a low carrier frequency. If the IF is sufficiently high, then a diode could be used. Unfortunately, Chris did not provide enough detail to allow us to offer a useful answer. Perhaps Chris can add a few more details. craigm ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
