There are a series of specifications from IPC dealing with High Speed 
     / High Frequency design and materials. Check out IPC-D-316, IPC-D-317, 
     IPC-D-318 & IPC-2141. Feel free to email me directly if you need 
     further assistance.
     
     Regards,
     
     Tom Bresnan
     Chairman, IPC High Speed/High Frequency Subcommittee 
     [log in to unmask]
     


______________________________ Reply Separator _________________________________
Subject: DES
Author:  [log in to unmask] at INTERNET_GATEWAY
Date:    4/2/97 5:23 P


I need a table of electrical characteristics of PCB's.
 Specifically:
           impedance of trace of differend widths and spacing from ground
planes
           (assume common materials such as FR4)
     
           propagation velocity as a function of trace width etc.
     
     
I would appreciate help pointing me at this information
     
     
Ray Klein
     
     
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