[sdiy] preferred noise source circuits

[Tom Wiltshire]

On 23 Jun 2009, at 08:25, David G. Dixon wrote:
> 1) Does anyone have any strong opinions of these circuits in  
> general? (Feel
> free to respond offline if those opinions are negative.)

Sorry, but I'm going to be negative in public.

I don't see the point of analog noise sources, or digital noise  
sources based on a lot of logic chips and shift registers. You can do  
a digital noise source with a simple 8-pin DIP microprocessor that  
will give you much better noise quality than most analogue noise  
sources. Anything else is just using up PCB space to no real purpose.  
Once you've got your noise, you can do what you like with it (S&H,  
comparators, random gates, etc). If it was me, I'd probably do this  
digitally too - after all, why generate a gate with analog circuitry?

<dons tin hat and leaps into bunker>

T.