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A novel compact model using pole-residue method for ultra-broadband on-chip transformer is presented. This model possesses several paralleled branches for high-order effects of transformers, and it can be easily extracted using the procedure of vector fitting (VF) written in MATLAB. Meanwhile, the key features of the existing equivalent circuit models have been analyzed. The proposed model reaches...
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...
For the Extended Kalman Filter (EKF) not easy to adjust, difficult to apply on system of updating step time, and its linearization process may generate error of approximation, in recent year, some new methods about expansion Kalman filter to nonlinear system have been proposed. This paper present a new method that Sigma-point Kalman filter estimate SOC through the use of weighted statistical linear...
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