From: John Woodgate
Subject: Re: Audio noise in diff amps
Date: Thu, 19 Dec 2002 14:59:44 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Thu, 19 Dec 2002 16:53:52 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Rick wrote
(in ) about 'Audio noise in diff
amps', on Thu, 19 Dec 2002:
>Phil Allison wrote:
>> ** Hoy there !! I can barely see you Mr Pearce - your hole is half way
>> to China right now.
>Tut! Since you know Don to be a Brit, why do you assume that he'd end
>up in China if he kept digging - it's Americans who dig to China.
He obviously assumed that DP has a poor sense of direction. (;-)
>Don, should he carry on digging this theoretical hole, would end up
>in...Australia. He could pop up right next to you.
Well, no, not from Britain. London is 51 deg 30' N, 0 deg. E/W. The
point at 51 deg 30' S, 180 deg. E/W is south-west of New Zealand, near
the - wait for it - Antipodes Islands.
>More likely, since you seem to think that resistors have magic
>noise power that doesn't dissipate, and he seems to think that
>sqrt(4KTBR) doesn't contain an R, you'll both meet half way.
Apart from typos, they have both been right all along. The whole shebang
is just due to different interpretations of the symbol 'dBm'. When I
meticulously correct the wrong use of symbols (which I rarely dare to do
on the net), I am called 'pedantic', but symbols are part of our
technical language and if we write 'green' but mean 'red' (or even
'Greek'), there are bound to be disputes.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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