Well... let's see.... a typical miniature electret mic draws between 0.5 and 1.5 ma. You're asking the balance of the circuit to draw less than 0 ma right?
The dynamic range to provide a constant output at your two limits will probably exceed 50db. I hope you're not thinking of running this on 5 volts are you? The control voltage/current of the circuitry to adjust gain of your
compressor, the shunting or "compressing" of the audio alone will exceed a few ma. Are you sure of your requirements at this point?
Rick

"Gary (REMOVE THIS)" wrote:

> Hi,
>
> Anyone have a circuit that will give more or less constant output using a electret mic as input, even if you are 1 metre or 5 metres from mic? Circuit must be low cost, low current would be good <1ma? and simple if possible?
>
> Thanks Gary
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads