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From: Tony Williams
Subject: Re: Amplifying stage with *negative* Voltage gain??
Date: Thu, 12 Dec 2002 13:22:41 +0000 (GMT)
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NNTP-Posting-Date: Thu, 12 Dec 2002 13:43:34 +0000 (UTC)
User-Agent: Pluto/1.14i (RISC-OS/3.60)
In article ,
Paul Burridge wrote:
> On Wed, 11 Dec 2002 11:49:27 +0000 (GMT), Tony Williams
> opined thusly:
> > The Gain of your follower is 1, (it's ok).
> AFAICS it just a bit *over* 1 and therefore impossible!
Isn't that just the scope probe loading affecting the
low-impedance output less than the input?
> It's coming straight off the osc. The idea of the e/follower stage was
> to act as a buffer for the osc. But the output level of the osc itself
> still holds up fine with both the e/follower and probe hooked up to
I'm beginning to suspect Paul that it is all working
ok..... until poking a (x1) scope probe on the input
buggerates the oscillator.
At this stage you've done so many exhaustive checks
that you can pretty well believe that the ac signal
on the emitter is a fairly good 1:1 representation
of what is being delivered to the base.
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