[SI-LIST] Re: DC resistance of the Power Supply on PCB

Dear Andy

I measure the dc resistance between Power and Ground. Normally, the resistance 
is about dozens of ohms.

Best Regards

Zhangkun
2005.11.30

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----- Original Message -----
From: Andrew Ingraham <a.ingraham@xxxxxxxx>
Date: Wednesday, November 30, 2005 10:45 pm
Subject: [SI-LIST] Re: DC resistance of the Power Supply on PCB

> > In our testing, we often use multimeter to measure the DC 
> resistance of
> > power net, while the product is powered off. Sometime, the 
> measure result
> > is about 1 ohm. I do not understand why.
> 
> Do you mean the resistance from point A to point B of the same net 
> (and that
> you think 1 ohm is too large)?
> 
> Or do you mean the resistance between + and - rails of a board 
> that is fully
> populated with active devices and capacitors (and that you think 1 
> ohm is
> too small)?
> 
> Please clarify.
> 
> Also please suggest what resistance you would have expected in 
> your case.
> 
> Regards,
> Andy
> 
> 
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