In this work we propose new equivalent circuit models for integrated inductors based on the conventional lumped element model. Automatic tools to assist the designers in selecting and automatically laying-out integrated inductors are also reported. Model development is based on measurements taken from more than 100 integrated spiral inductors designed and fabricated in a standard silicon process. We demonstrate the capacity of the proposed models to accurately predict the integrated inductor behavior in a wider frequency range than the conventional model. Our equations are coded in an set of tools that requests the desired inductance value at a determined frequency and gives back the geometry of the better inductors available in a particular technology.
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