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From: "Ken Taylor"
Subject: Re: output impedance
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Sat, 9 Nov 2002 07:49:40 +1300
NNTP-Posting-Date: Sat, 09 Nov 2002 07:48:26 NZDT
"Reg Edwards" wrote in message
> > The impedance is in parallel with the current source, not in series.
> > the Thevenin-Norton theorem.
> I have had 60 or more years of understanding electric circuits and have
> NEVER NEVER needed to refer to a "theorem". I have never even heard or
> long forgotten most of them or what they are about. Nothing beyond Ohm's
> Law has ever been of any use.
> Anybody who drags up a theorem in support of some explanation or other
> understands very little of what he/she is waffling about and is merely
> plagiarising and parotting an old wives' tale. To mention a theorem is an
> admission of ignorance. Or an admission that he/she has a memory and has
> read something somewhere. Or who had a teacher who was none the wiser
> Painting by numbers? The answer to your question is Theorem 19. Or is it
> 33.5 ? End of answer.
> OK? Next question please.
Sixty years experience of what, exactly? Being the loud mouthed bin emptier
at the back of the workshop? If you really do have experience (and I suspect
you do) you've even been using the theorem quoted, probably without having
to think of it.
Apart from which, Mick cited the theorem with the intention that the OP
could go off and do some research and learn some useful stuff that could sit
at the back of his mind and be useful without having to be consciously
recalled. A bit like I'm sure you've used this stuff before.
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