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From: Don Pearce
Subject: Re: How does a mixer work?
Date: Thu, 17 Oct 2002 14:50:37 +0430
References: <firstname.lastname@example.org> <email@example.com>
X-Newsreader: Forte Agent 1.91/32.564
On 17 Oct 2002 08:30:56 GMT, firstname.lastname@example.org (Richard
Steven Walz) wrote:
>In article <email@example.com>,
>Asa Cannell wrote:
>>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?
>People use "mix" rather loosely in RF. Actually, a modulator multiplies.
>A true audio mixer merely adds. Now when you add sinusoids you can wind
>up doing an effective multiplication, but that's merely a side-effect.
Pardon? That would be a piece of maths that is new to me. Please
And of course the word "mixer" has no property of linearity built into
it. If the RF interpretation is "multiply" and the audio one is "add"
- they are simply different> Neither is more "right"
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