HP 54753A User Manual page 242

Transmission Line Theory Applied to Digital Systems
Transmission Line Design
Equation 10 may be illustrated by solving for the steady state reflection voltage
at t = 2T + T :
D 1
( ) 0.32 0.58 (
V' = 1.0 –
From the analysis of Figure 11-5, it is concluded that the MECL gate can safely
drive the transmission line (Z
gate loads lumped at the end of the line, since less than 100 mV of undershoot
occurs. The remaining noise margin will be typically greater than 100 mV.
11-14
50
 
1 + ----- -
∞
 
) – ( )
-------------- - + 0.82 – 0.193
 
2
 
= 50 Ω) with a 100 Ω load resistor and with the
o
50
 
1 + ----- -
∞
 
( )
– 0.32 0.58 – -------------- - =
 
2
 
78 mV