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A novel wideband 1-π equivalent circuit model for on-chip spiral inductors is presented. A substrate network, consisting of R/L/C, is proposed to model the broadband loss mechanisms in the silicon substrate. The skin and distributed effects for windings have been taken into account. A series of inductors with different geometries are fabricated in standard 0.18-μm 1P6M RF CMOS process to verify the...
Lumped-element models and parameter extraction methods for OCA are vital to successfully integrating OCA with RFID tags. In this paper, a compact model for OCA at UHF band is proposed. Metal loss (skin and proximity effects) and substrate coupling are taken into account. Meantime, a fast and physics meaningful parameter extraction method is presented. Two OCA prototypes and one fully-integrated UHF...
A physics-based equivalent lumped-circuit model for on-chip symmetric intertwined transformer is presented in this paper. This model accurately predicts the skin effect and proximity effect of the primary and secondary coils inductors over a wide-frequency range using a ladder `4-element' structure, respectively. One transformer loop and two RC networks are used to model the substrate loss related...
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