[sdiy] Handy DIY tip #213/noise color

[Tim Ressel]

Yo,

Okay, since this got all serious (tsk tsk), I have a
serious question: Just how do you test the Noise to
Noise ratio? Or to put it a better way, how does one
gauge the quality of noise? What is the standard?

--tr

--- Ian Fritz <ijfritz at earthlink.net> wrote:
> Another example: Suppose you are trying to make a
> pure white noise source. 
> If the junction you are using is not ideal, you also
> get some undesirable 
> 1/f or popcorn noise at low frequency.  So that
> "bad" noise would be the 
> "noise" and the "good" (white) noise would be the
> "signal".
> 
>    Ian
> 
> 
> >In the case of a noise generator, the noise IS the
> signal, so any signal
> >contained in the noise, would be considered
> "noise". A reversal of roles.
> >
> >For example, if you fail to bypass the supply to a
> reversed biased emitter
> >noise generator, you can get other periodic signals
> from the power supply
> >lines. These periodic signals are "noise" since
> they disturb the gaussian
> >distribution of the noise (which is the signal of
> interest).
> 


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