Well by golly you got me there. I deal mostly with low power (<3A), speech
or FM quality audio, and <100MHz digital IO. When I need an audio or PS
ground with a single tie point I use a zerohm resitor. And yes I look at Pd
to determine the size. 

> -----Original Message-----
> From: Cliff Gerhard [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, February 21, 2002 14:25
> To: Protel EDA Forum
> Subject: Re: [PEDA] Tie Components
> 
> 
> Although they will work just fine in the right applications, beware of
> "zero" Ohm resistors in high current and high frequency areas 
> because they
> are not really 0 Ohms.  They have a finite resistance and 
> will dissipate
> heat.  If you use them to bridge a path with significant 
> current, you should
> make sure that the Wattage rating will not be exceeded and 
> also consider the
> Voltage drop.  They are also not a very good short at high 
> frequencies.
> 
> 
> Cliff Gerhard, P.E.
> E-M Designs, Inc.
> www.GerhardEng.com
> 
> 
> -----Original Message-----
> From: Darryl Newberry [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, February 21, 2002 10:23 AM
> To: 'Protel EDA Forum'
> Subject: Re: [PEDA] Tie compoents(Ex: RF footprints)
> 
> 
> Jeez, you guys do things the hard way, I just use a zero-ohm 
> resistor, it's
> a standard part available from multiple sources in any size 
> from 0201 up to
> 2512. This works especially well for maintaining multiple 
> grounds with a
> single point tie.
> 
> 

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