Hello,

100 ohms is hard to get. For a simple microstrip, the height (distance to 
ground plane) has to be about 3 times the trace width (for fr4).  One to 
one gives about 75 ohms. The easy one is 50 ohms, trace width about 2 times 
the height. Burieed lines will have even lower impedance. I suggest that 
you have a talk with the designer!

Richard


Cheesecote Mountain CAMAC,  24 Halley Drive; Pomona, NY 10970
voice: 845 364 0211, fax: 845 362 6947,  www.cmcamac.com


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