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From: John Woodgate
Subject: Re: How does a mixer work?
Date: Fri, 25 Oct 2002 17:46:17 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Fri, 25 Oct 2002 18:54:34 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Fred Bloggs
wrote (in <3DB95575.email@example.com>) about 'How does a mixer work?',
on Fri, 25 Oct 2002:
> I checked my 1943 addition of Terman's Radio
>Engineers handbook, and the first thing he does is decompose the
>classical AM modulation function into the carrier and sideband summation
>which he credits to a 1923 IRE paper by Hartley.
Quite. The argument about the 'reality' of the two sides of Hartley's
equation has been going on ever since. There is a lot about it in
ancient issues of 'Wireless World'.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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