Boosting electret mic to be read by ADC

Discussion in 'General Electronics Chat' started by Razor Concepts, Jun 19, 2009.

  1. Razor Concepts

    Thread Starter Senior Member

    Oct 7, 2008
    I want to convert an electret microphones output that can be easily read by a 10 bit ADC, everything running at 5v.

    So far I have this preamp circuit working:


    And I plan to use an envelope filter like this to smooth things out:


    Except that I am using a tl072, so I have another amp available to me.

    What would be the best way to get a nice analog voltage out? Thanks
  2. Audioguru


    Dec 20, 2007
    You posted your envelope filter schematic somewhere that does not work. Please post it here attached to your reply.

    The minimum supply voltage for a TL07x is 7V and they work poorly with a supply of only 5V.
    With a +7V supply the max voltage is +5.8V and the minimum voltage is +1.2V.