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April 1997

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From [log in to unmask] Tue Apr 29 09:
52:06 1997
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Re: How stable and repeatable are PCB transmission character
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m designing a highspeed processor board and have come to the amazing 
requirement of having a VERY precise delay of 4.8 +/- .25 nanoseconds.
  
Is this achievable in volume production printed circuit boards? 
I am using FR4 medium and have 8 layers to work with. What geometries 
and layering are best?
  
My alternatives a custom/graded silicon delay lines or, perish the thought, 
an
adjustment pot. Please help!!
  
  
Ray Klein 
  
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