[SI-LIST] : Power Distribution Design

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From: Hansen, Chris (chris_hansen@adaptec.com)
Date: Tue Apr 04 2000 - 10:57:20 PDT


Chapter 8 of Howard Johnson's, "High-Speed Digital Design A Handbook of
Black Magic", he goes through an example that calculates the power bypassing
necessary when 100 gates switch simultaneously in 5nS, and each driving a
10pF load. The surge current that calulated for this example is
dI=N*C*dV/dt), which looks like it assumes a lumped capacitive situation.
In a situation where the rise time of the drivers make the signal trace look
like a transmission line, would it be valid to change this equation to
dI=N*(dV/Zo)?
 
 
Chris Hansen
Sr. Design Engineer
DPT & Adaptec Companies
140 Candace Drive
Maitland, Florida 32751
(407) 830 5522 ext. 302
chris_hansen@adaptec.com <mailto:chris_hansen@adaptec.com>
 

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