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Date: Wed, 04 Dec 2002 11:30:11 +0100
From: Rene Tschaggelar
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Subject: Re: Amplifying stage with *negative* Voltage gain??
A negative gain is inverting. Your gain is just smaller than 1.
You should measure the frequency response of your said emitter
follower. What are the input and output impedances ?
what is the load ?
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Paul Burridge wrote:
> I've just put together a single-stage buffer amp for an oscillator
> stage. It's in emitter follower configuration. The input signal is 8v
> p--p; the output, OTOH, is only 2v p-p! The signal frequency is
> 3.57mhz and the active device I'm using for the buffer (a BC337) is
> supposed to be good for 150mhz. So where are all me volts going? I'd
> expect to get 99% of 8v out. The general formula for V gain in C/E
> amps is RE/RE+re so typically comes out at just under 1. The 8v signal
> is present on the base pin; only 2v sig out on the emitter pin.
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