Re: Op-amps and Transistors

From: Kevin Aylward (salesEXTRACT_at_anasoft.co.uk)
Date: 09/14/04 

Date: Tue, 14 Sep 2004 21:47:30 GMT

Ken wrote:
> On Tue, 14 Sep 2004 09:51:27 GMT, "Kevin Aylward"
> <salesEXTRACT@anasoft.co.uk> wrote:
>
>
>> *All* transisters are voltage controled. End of story.
>> http://www.anasoft.co.uk/EE/index.html
>
>
> Not according to your page either (Ib).

Ho hummm again. What part of "controlled" do you have trouble with?
Look, dude, the first order equation for transistor operation, derived
in any elementary text book on semiconductor physics, is:

Ie = Io(T).(exp(Vbe.q/KT) - 1)

Ic ~= Ie

Now, prey tell me, where is the base current in this equation?

The fact that some base current flows dose not mean that the base
current is a *controlling* factor. You need to appreciate the difference
between causal relations and correlated relations.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
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