At 09:45 AM 1/11/2002 +0200, Vasile Surducan wrote:
>On Thu, 10 Jan 2002, dave vanhorn wrote:
>
> > One fix would be just a little series resistance in the line. 1 ohm might
> > be enough.
> > The idea is to make all those discharged caps not be such a good
> > short-circuit at power-on.
>
>   Dave, ufortunately this trick is not working all the time. Sometime
>instead of minimising glitch is increasing the noise on supply tracks. I
>not recommend this solution for analogic board and mixed signal board. I
>can't explain why, is just a remark based on practical experience ( I
>have tested the method with resistors from 1 to 10 ohm on different boards


As I said, this whole approach of connecting a discharged capacitance to a
regulated supply line is highly inadvisable.
The series R would greatly depend on the load.  When I design a section to
be powered down, it gets it's own regulator, running from the unreg supply.
Then none of this mess is a problem..

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