Gate Delay Estimation in STA under Dynamic Power Supply Noise

Takaaki OKUMURA  Fumihiro MINAMI  Kenji SHIMAZAKI  Kimihiko KUWADA  Masanori HASHIMOTO  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E93-A   No.12   pp.2447-2455
Publication Date: 2010/12/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E93.A.2447
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Device and Circuit Modeling and Analysis
Keyword: 
power supply noise,  gate delay,  timing analysis,  

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Summary: 
This paper presents a gate delay estimation method that takes into account dynamic power supply noise. We review STA based on static IR-drop analysis and a conventional method for dynamic noise waveform, and reveal their limitations and problems that originate from circuit structures and higher delay sensitivity to voltage in advanced technologies. We then propose a gate delay computation that overcomes the problems with iterative computations and consideration of input voltage drop. Evaluation results with various circuits and noise injection timings show that the proposed method estimates path delay fluctuation well within 1% error on average.