[sdiy] Handy DIY tip #213/noise color

[Grant Richter]

Signal to noise is kind of a misleading term.

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).

> BTW, how do you calculate the signal to noise ratio of a noise generator
> anyway?
> 
> %^)
> 
>