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December 1998

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Subject:
20H Rule ...
From:
Doug <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 9 Dec 1998 00:19:54 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (33 lines) 
The "20H Rule" specifies that the amount of cutback
of the power plane from the edge of it's associated
ground is twenty times the height between the power
plane and ground plane.  Did that sound ok?

If not, here's an ASCII graphical for you ...


    Ground Plane
------------------------------------------

  Distance between Power Plane and
  Ground Plane = H

--------------------  <------------------>
    Power Plane         Cutback of Power
                        Plane = 20*H


Regards,  Doug McKean

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