multiple power supplies in a modular

[Merlin Zener]

The Dark force of dance wrote:
> [...big snip]
> I have observed audio mixers which use a set of three terminal regulators on
> each input channel to reduce PSU coupling but in these cases it is helpful
> if a Star topology is observed for earthing. That is to say, that all earth
> returns originate from a physically central point in the system. I would
> assume that this would be hard to achieve in a modular synth. However along
> those lines, a better approach might be to provide a central, pre-regulated
> PSU. Say +/- 20 to 25 volts. Then for sensitive modules such as VCOs and
> LFOs, one could provide local regulation. This may help prevent any PSU
> coupling due to the relatively long feed lines one would encounter in such a
> system.
> 

One approach I've used (er - copied... :) is to have a standard
power supply of, say, +/-15V or 18V and the first thing on each
board is a pair of 100 ohm resistors and then 100uF caps to
ground. Works for me.

My two cents worth... <shrug>
:))

-- 
Merlin Zener                            mailto:merlin at ion.com.au
Piano and Synthesizer               voice: (+61) (0) 418 779 594
Gold Coast, Australia              http://www.ion.com.au/~merlin

"No-one ever went blind from looking on the bright side of life"