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From: n1mjr@IASTATE.EDU (Reilly Michael Joseph)
Newsgroups: sci.electronics
Subject: Audio white noise source
Keywords: noise, white, generator, source
Message-ID: <1991Apr9.035435@IASTATE.EDU>
Date: 9 Apr 91 08:54:35 GMT
Sender: news@news.iastate.edu (USENET News System)
Reply-To: n1mjr@IASTATE.EDU (Reilly Michael Joseph)
Organization: Iowa State University
Lines: 23

Help!

I need a reasonably flat white noise source with a bandwidth
from 0 kHz to about 40 kHz.  (I'm building a system to emulate the
mating calls of katydids.)

I'm looking for some sort of single-chip solution.  The output level
isn't critical, since it will have to be buffered and switched anyway.

I've fooled around a little with amplifying the noise across a reverse
biased zener diode, but the level of amplification needed makes the
circuit design and layout a little too critical for my taste.

Any help at all will be greatly appreciated.


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     Mike Reilly                    Stop the madness, Don't do EE

     n1.mjr@isumvs
     n1mjr@isuvms
     n1mjr@iastate.edu