Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!fluke!ssc-vax!uvicctr.UVic.ca!collinge
From: collinge@uvicctr.UVic.ca.UUCP (Doug Collinge)
Newsgroups: sci.electronics
Subject: Re: Microphone noise
Message-ID: <737@uvicctr.UVic.ca.UUCP>
Date: 1 Aug 89 18:29:43 GMT
References: <12296@s.ms.uky.edu>
Reply-To: collinge@uvicctr.UVic.ca.UUCP (Doug Collinge)
Distribution: usa
Organization: University of Victoria, Victoria B.C. Canada
Lines: 16

In article <12296@s.ms.uky.edu> tindle@ms.uky.edu (Ken Tindle) writes:
>I'm having (very unexpected) problems designing a microphone amp circuit.
>Audio I get easily; it's the noise that goes with it I could live without.

Mic preamps are pretty tricky for several reasons.  I suggest that you
rip off the preamp design from some existing mixing board.  For e.g.,
the Soundcraft mixers use a pair of discrete transistors as a front end
to a TL072 bifet opamp.
-- 
		Doug Collinge
		School of Music, University of Victoria,
		PO Box 1700, Victoria, B.C., Canada,  V8W 2Y2  
		collinge@uvunix.BITNET
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