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From: Bob Masta on 14 Sep 2009 08:19
On Sun, 13 Sep 2009 17:11:50 -0700 (PDT), Bret
Cahill <BretCahill(a)peoplepc.com> wrote:

>> >The capacitor is between the output and ground.
>
>> Output of what?
>
>The quotient of two signals where one or both have some noise.
>
>A resistor is added or it already has some inherent resistance. The
>cap is only to smooth out the noise.
>
>The exponential moving average, at least on Excel seems to do the
>trick. Recent data are heavily weighted, yet large disruptions have
>little effect, at least if they are short term.
>
>The results aren't nearly as good adding "noise" to a signal on
>SPICE. The problem may be the "noise" I'm adding is just a pulse or
>sine function with a constant frequency.
>
>Maybe using several dozen voltage sources, each with only one pulse
>but at different times, will properly simulate the noise.
>

I'm not a SPICE user, but I'd be surprised if
there wasn't some built-in way to simulate noise.
If you can generate a (pseudo) random value for
each sample, that's pure white noise.

Best regards,


Bob Masta

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