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From: Fred Bloggs
User-Agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0
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Subject: Re: How does a mixer work?
References: <email@example.com> <2ltr9.338$cV6.firstname.lastname@example.org>
Date: Thu, 17 Oct 2002 15:30:40 GMT
NNTP-Posting-Date: Thu, 17 Oct 2002 08:30:40 PDT
Organization: EarthLink Inc. -- http://www.EarthLink.net
Kevin Aylward wrote:
> "Asa Cannell" wrote in message
>>How does a mixer work? I don't understand why it needs a non-linear
>>element. I think examples of why a linear element (resistor) wont work
>>would help illustrate why a non-linear element (diode) will. Also,
>>what does 'mutiply' mean in terms of mixing? What if two DC signals
>>are applied to a mixer, like 2V and 4V? Will the output be 8V?
> The basic reason is based on a standard trigonometric result.
> Sin(A)*Sin(B)= 0.5*(Cos(A-B) + cos(A+B))
Huh? And which alternative reality is this?
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