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Wide-band compact modeling of spiral inductors in RFICs

TitleWide-band compact modeling of spiral inductors in RFICs
Publication TypeConference Paper
Year of Publication2002
AuthorsMelendy, D., P. Francis, C. Pichler, K. Hwang, G. Srinivasan, and A. Weisshaar
Conference Name2002 International Microwave Symposium (MTT 2002)
Pagination717 - 720
Date Published06/2002
Conference LocationSeattle, WA

A new wide-band compact modeling methodology for planar spiral inductors on lossy silicon substrate is presented. The new ideal lumped-element equivalent circuit model employs transformer loops in the series branch to include the effects of the frequency-dependent losses, in particular eddy-current loss in the bulk silicon substrate. A robust automated extraction procedure is employed to extract the element values of the new compact model. The new automated modeling methodology has been applied to a typical 1.5 nH spiral fabricated on a low-resistivity CMOS substrate. The frequency-dependent series resistance and inductance as well as the quality factor obtained with the new wideband model are in excellent agreement with the measured results over a 10 GHz bandwidth.