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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> <email@example.com>
Date: Thu, 05 Dec 2002 09:00:10 -0500
NNTP-Posting-Date: Thu, 05 Dec 2002 09:00:11 EST
Organization: Bell Sympatico
Tony Williams wrote:
> In article <3DEF1DC0.5EDD@Spam.Bots>,
> Mike Monett wrote:
> > The 1.08k emitter resistance can easily drive the 10pF scope probe
> > capacitance. Here's the waveforms.
> > http://www3.sympatico.ca/add.automation/misc/cctrans.gif
> > I hope this give you confidence your circuit should work.
> I think I would look closer at what the OP has,
> connected to that output 1000pF. A few hundred
> pF hanging off there would provide a nice 4:1
> capacitive divider.... a length of coax maybe?
> (Even going off to the scope??)
> Tony Williams.
Yes, what you say is true if there was a coax on the output. I took Paul
at his word tht there was nothing connected except a scope probe. I'm not
sure if he mentioned the probe attenuation - if it is 1:1, there could be
problems. Due to the fequency, I assume it is a 10:1 probe with about 10 pf
capacitance. This could be a mistake:)
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