[SI-LIST] Transmission line impedance

  • From: Sam Pete <cygnul@xxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Tue, 19 Dec 2006 22:27:44 -0800 (PST)

Hi Friends,
   
  Whenever we refer to SI books or application notes, the impedance of the 
transmission line is mentioned as 50-ohms or 60-ohms.  What is the speciffic 
reason behind this value? why can't it be something different than this? OR Why 
this 50-ohms conceptualized from the driver's perspective? (evolution of 
transmission line theory for Digital Design)
  Please flood me some info on this.
   
  Regards,
  Sam
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