FreeLists / si-list / [SI-LIST] Diode Termination

[Ria R <ria_rr_84@xxxxxxxxx>]

All,
  I have a question on something I read about diode termination.
  Howard Johnson in one of his answers to a diode termination question says the 
following:
One  equation  of interest regarding the  theory  of diode  terminations  is  
the  relation  between  the incident   signal   amplitude   traveling   down   
a transmission line (I), the amplitude of  the  signal reflected  at  the  end  
of  a  line  (R),  and  the amplitude of the signal that exits the line  and  
is apparent at the load (T).  

I am clear about "I" and "R". But what does "T" mean? I thought there was just 
signal incident and signal reflected. Is there a signal "Exiting"??

Also, if this is explained, the next question is, what does he mean by:

In  English,  the signal at the end of the  line  is the   superposition  of  
whatever  came   in,   plus whatever  bounced back toward the driver. This  
same equation  may  be  re-written to express  "R"  as  a function of "T" and 
"I":
   
       R = T - I

Can someone please clarify the above equation??

Thanks in advance.

Regards,
Ria.


      
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