Low Frequency IQ Demodulator

Discussion in 'General Electronics Chat' started by SJCoyle, Aug 7, 2013.

  1. SJCoyle

    Thread Starter New Member

    Aug 7, 2013
    1
    0
    Hey,

    I'm new to the site, and I'm a novice at circuits in general. I'm trying to create a circuit that will pass a ~5MHz frequency through and Op Amp and into an IQ Demodulator. I want the output frequency to be in the 10+ kHz range so I can filter it and sample it. I really don't know much about what specifications I should be looking for in an demodulator to get the one I want. Anyone have any ideas on what I should be looking for or how I should be looking for it?

    Thanks,

    Sean
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,775
    4,804
    Is the 5MHz the carrier frequency and the information signal is bandlimited to something less than 10kHz?

    How is the information impressed onto the carrier? In other words, what kind of modulation was used to create the signal you are sending into the demodulator?
     
  3. ATGM

    New Member

    Jan 23, 2015
    3
    0
    Hi - sorry if this is just a bit late for you, Sean. The AD8333 is not the cheapest part but it looks like a good start point to have the most of the IQ demodulator complexity offloaded to the IC instead of your own design responsibility.
     
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