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From: Mike Monett
X-Mailer: Mozilla 2.02 (Win16; I)
Subject: Re: Amplifying stage with *negative* Voltage gain??
References: <firstname.lastname@example.org> <3DEF1DC0.5EDD@Spam.Bots>
Date: Thu, 05 Dec 2002 09:10:32 -0500
NNTP-Posting-Date: Thu, 05 Dec 2002 09:10:33 EST
Organization: Bell Sympatico
Paul Burridge wrote:
> > But I have a question. If you can drive the buffer with a solid 8V,
> > the output impedance of the oscillator must be pretty low.
> Indeed! But this was only cobbled together for test purposes. I'm
> aware that a practical stage would be best designed for much lower
> output for stability reasons.
> Thanks again for your efforts.
Thanks for the reply. Tony raised a good point - what's the attenuation
of your scope probe?
As far as a lower impedance driver, has you considered a complimentary
NPN/PNP pair with the bases and emitters tied together? You can use John
Larkin's trick of connecting a resistor between the bases and emitters to
reduce the crossover distortion. I tried this - it really works well.
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