From: John Woodgate
Subject: Re: Aylward, Engelhardt: Noise in a transient sim?
Date: Sat, 26 Oct 2002 12:07:08 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sat, 26 Oct 2002 13:36:40 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Kevin Aylward
wrote (in <4Zsu9.378$lU1.email@example.com
.ntli.net>) about 'Aylward, Engelhardt: Noise in a transient sim?', on
Sat, 26 Oct 2002:
>I was pointing out the fact that the true signal BW, *is* the signal
>noise BW. This should indicate quite clearly, that a claim of
>0.01nv/sqrth over a BW of 7Ghz, is quite nonsense. Why you don't see
>this is pretty amazing really.
You two are continually talking 'past' each other. Look at it in a
different way. To get 0.01 nV/sqrth, the circuit resistance, given by:
R = V^2/(4kTB), = 9 x 10^-13 ohms at 290 K. Unlikely.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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