Global passivity enforcement algorithm for macromodels of interconnect subnetworks characterized by tabulated data

Authors:
Dharmendra Saraswat;Ramachandra Achar;Michel S. Nakhla
Affiliations:
Department of Electronics, Carleton University, Ottawa, ON, Canada;Department of Electronics, Carleton University, Ottawa, ON, Canada;Department of Electronics, Carleton University, Ottawa, ON, Canada
Venue:
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Year:
2005

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Abstract

With the continually increasing operating frequencies, complex high-speed interconnect and package modules require characterization based on measured/simulated data. Several algorithms were recently suggested for macromodeling such types of data to enable unified transient analysis in the presence of external network elements. One of the critical issues involved here is the passivity violations associated with the computed macromodel. To address this issue, a new passivity enforcement algorithm is presented in this paper. The proposed method adopts a global approach for passivity enforcement by ensuring that the passivity correction at a certain region does not introduce new passivity violations at other parts of the frequency spectrum. It also provides an error estimate for the response of the passivity corrected macromodel.