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This paper presents a simple and accurate model for determining I on and I off of a double-gate FinFET with varying gate fin shapes. Simulations show that gate fin shape variation results in significant changes in the leakage and driving capability of the device. We perform TCAD simulations of double-gate FinFET structures in order to analyze the effect of the gate fin body thickness (T si ) variation on the electrical properties of the device. The thicknesses of the source and drain side are found to have different effects on the device. A simple model is proposed using the threshold voltage change due to the thickness variation along the gate fin. Simulation results show that the models match well with I on and I off within 1.3% and 4.8% errors, respectively. In addition, we propose an optimal fin body shape to reduce the leakage current while providing a similar driving current to that in the nominal FinFET.

The authors attempt to achieve both high dynamic performance and maximal power efficiency for induction motors by means of linear decoupling of rotor speed (or motor torque) and rotor flux. The induction motor with the proposed controller possesses the input-output dynamic characteristics of a linear system such that the rotor speed (or motor torque) and the rotor flux are decoupled. The rotor speed (or motor torque) responses are not affected by abrupt changes in the rotor flux, and vice versa. The rotor flux need not be measured but is estimated by the well-known flux simulator. The effect of large variation in the rotor resistance on the control performances is minimized by using a parameter adaptation method. The authors present simulation and experimental results as well as mathematical performance analyses. >

An attempt is made to control induction motors with high power efficiency as well as high dynamic performance by utilizing recently developed nonlinear feedback control techniques. The controller consists of three subcontrollers: a saturation current controller, a decoupling controller, and a well-known flux simulator. The decoupling controller decouples rotor speed (or motor torque) and rotor flux linearly. The controller does not need the transformation between a d-q synchronously rotating frame and an x-y stator-fixed frame. It is computationally quite simple and does not depend on the rotor resistance, which varies widely with the machine temperature. Performance analysis and simulation results are presented. >