Скачать или смотреть Elmore Delay Explained: RC Trees, Dominant Poles and Timing Intuition

Elmore Delay is one of the most widely used approximations for estimating delay in RC networks, interconnects and multi-stage digital paths.
In this lecture, we derive the Elmore Delay expression, understand its physical meaning, and learn when it gives accurate timing estimates.

We begin by reviewing RC trees and how voltage waveforms behave in multi-node resistive networks.
From there, we develop the Elmore Delay formula using first-moment analysis, interpret each term physically, and see why the resistance “upstream” of a capacitor determines its contribution to delay.

The lecture also explains dominant pole intuition, how interconnect geometry affects delay, and when more detailed models are necessary.

Topics covered:
• RC trees and distributed interconnects
• Step response behavior in multi-node RC networks
• Deriving the Elmore Delay approximation
• Physical meaning of resistance-weighted capacitances
• Dominant pole interpretation
• When Elmore gives good predictions and when it fails
• Using Elmore Delay in VLSI timing analysis

Who this video is for:
• Students learning VLSI timing, interconnect modeling or RC networks
• Engineers refreshing delay estimation techniques
• GATE, ESE and interview preparation
• Anyone wanting a deep yet intuitive explanation of Elmore Delay

By the end of the lecture, you will understand how to compute Elmore Delay, how to interpret it intuitively, and how to use it for fast timing estimation in RC interconnects and signal paths.