Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
References: <email@example.com> <2ltr9.338$cV6.firstname.lastname@example.org> <3DAED797.email@example.com> <firstname.lastname@example.org>
Subject: Re: How does a mixer work?
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Date: Thu, 17 Oct 2002 16:52:16 +0100
NNTP-Posting-Date: Thu, 17 Oct 2002 16:52:16 BST
"Jim Thompson" wrote in message
> On Thu, 17 Oct 2002 15:30:40 GMT,
> Fred Bloggs ,
> In Newsgroup: sci.electronics.design,
> Article: <3DAED797.email@example.com>,
> Entitled: "Re: How does a mixer work?",
> Wrote the following:
> |Kevin Aylward wrote:
> |> "Asa Cannell" wrote in message
> |> news:firstname.lastname@example.org...
> |>>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?
> Fred, Are you well ?:-) The equation is the classic trig showing that
> the product of sines contains sum and difference frequencies.
Its just he aint in the same space-time continuum as the rest of as
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