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Propagation Delay of an RC-Chain With a Ramp Input

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3 Author(s)
Mita, R. ; Dipt. di Ingegneria Elettrica Elettronica, Catania Univ. ; Palumbo, G. ; Poli, M.

In this brief, two simple semi-analytical models which allow the estimation of the propagation delay of an RC-chain with a linear input are presented. The closed-form models can be used to evaluate the propagation delay of wires in modern VLSI and ULSI processes. The two approximations, a continuous function and a piecewise function, exhibit a maximum error lower than 15% at the end of the chain. The models have been validated extensively through circuit simulations. In particular, 1000 different RC-chains have been considered and simulated demonstrating the accuracy of the proposed models with respect to the most widely used Elmore delay metric

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:54 ,  Issue: 1 )

Date of Publication:

Jan. 2007

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