Impact of on-chip interconnect frequency-dependent R(f) L(f) on digital and RF design

Yu Cao, Xuejue Huang, Dennis Sylvester, Tsu Jae King, Chenming Hu

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


On-chip global interconnect exhibits clear frequency dependence in both resistance (R) and inductance (L). In this paper, its impact on modern digital and radio frequency (RF) circuit design is examined. First, a physical and compact ladder circuit model is developed to capture this behavior, which only employs frequency independent R and L elements, and thus, supports transient analysis. Using this new model we demonstrate that the use of dc values for R and L is sufficient for timing analysis (i.e., 50% delay and slew rate) in digital designs. However, RL frequency dependence is critical for the analysis of signal integrity, shield line insertion, power supply stability, and RF inductor performance.

Original languageEnglish (US)
Pages (from-to)158-162
Number of pages5
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Issue number1
StatePublished - Jan 2005


  • Delay
  • Frequency-dependence
  • Inductance
  • Noise
  • Over-shoot
  • Quality factor
  • Resistance
  • Slew rate

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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