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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> <3DAED797.email@example.com>
Date: Thu, 17 Oct 2002 15:59:24 GMT
NNTP-Posting-Date: Thu, 17 Oct 2002 08:59:24 PDT
Organization: EarthLink Inc. -- http://www.EarthLink.net
Kevin Aylward wrote:
> "Fred Bloggs" wrote in message
>>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
>>>>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?
> This one. In what universe is this not true?
Seriously , Kevin, cos(A+B)=cos(A)cos(B)-sin(A)sin(B). If it's any
I like your explanation the best.
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