At 03:02 PM 4/27/02 +0100, 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

What is the intended application?  Do you need to preserve the envelope of
a speech or music signal or is the signal a tone of some sort?  What output
signal level do you need from the circuit?

The problem is that there are MANY techniques available to you: ranging
very cheap limiters (clipping circuit) on through very complex (maximize
modulation level for a broadcast transmitter).  You need to specify what
you need.

dwayne


Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

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