lecture22 - Lecture 22 Interconnect Modeling EECS 312...

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11/25/03 EECS 312 1 Lecture 22: Interconnect Modeling EECS 312 Reading: 4.3.2 (ignore skin effect), 4.4 (ignore 4.4.5), 9.3.3
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Last Time 11/25/03 EECS 312 2 Wire resistivity gets worse as wires get smaller (reverse scaling, different than device delay) Lumped wire delay overestimates actual delay (distributed) – Because the entire capacitance is NOT charged through the full wire resistance Wire RC delay increases quadratically with line length as both R and C rise linearly – This has implications on how to reduce RC delay – Repeaters are uniformly inserted to split the line into smaller delays, creating a linear dependence
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