[sdiy] Multiple Voltage Power Supply / design problem!

[Seb Francis]

Andre Majorel wrote:
> On 2007-05-14 17:14 +0100, Seb Francis wrote:
>
>   
>> I'd seriously consider using a PC power supply with some additional 
>> filtering.
>>     
>
> There is a paper somewhere that goes something like "why putting a
> linear regulator behind a switcher doesn't make a low-noise PS". I
> wish I could find it. Walt Jung ? Can't remember.
>
>   

I wasn't even thinking about putting a linear regulator on the end.
More along the lines of some inductors and capacitors.  Must be possible
to get reasonably clean DC from a PC PSU.  Plenty of PC audio equipment
manages very low SNR, much lower than your average synth.

Seb