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The subthreshold swing (SS) in MOSFETs is limited to 60 mV/dec change in drain current at room temperature by the Boltzmanr distribution of carriers, thus limiting its operating voltage (VD>SS×log Ion/IOFF). Ferroelectric FETs can achieve sub-60 mV/dec by harnessing the negative capacitance (NC) effect in a Ferroelectric (FE) material, thus enabling low voltage operation [1]. Previous works have...
Graphene is a typical two-dimensional material which has fascinating electrical, mechanical, and optical properties. In particular, graphene-based smart MEMS/NEMS devices can automatically respond to external electric stimulation and convert to mechanical movement. Actuator is one of the most potential applications of graphene-based MEMS. However, its reliability investigation has rarely been reported...
In this paper, an integrated EDMOS H-bridge that incorporates both segmented output transistors and segmented gate drivers is presented. This fully segmented design approach allows the output resistance of the H-bridge and the output resistance of the gate drivers to be dynamically adjusted. Dynamic adjustment of these parameters allows for the continuous optimization of the power conversion efficiency...
The reliability of solder interconnects in electronic packages is of vital importance. However, the demand for rapid product development puts an urgent need to develop new and fast testing methods and protocols for accurate crack initiation and propagation measurements for the new generation lead free solder. The failure is mainly due to two consecutive processes: viscoplastic deformation ultimately...
Based on the 2011 ITRS road map, the greater accessibility of higher number of TSVs in a specified area depends on the smarter miniaturization of the interconnect dimension in 3D IC packaging. Scaling down the TSV dimension has an inevitable effect on resistance, capacitance, signal transmission as well as the thermo-mechanical stress. We report that the lowering of the TSV diameter is permissible...
This paper investigates the influence of inverter nonlinearity on the parameter estimation in permanent magnet synchronous machines (PMSM). An estimator based on model reference adaptive system (MRAS) is firstly described for simultaneously estimating the stator winding resistance and rotor flux linkage, together with injection of a pulse of id <; 0 which is required for activating the estimation...
A single-walled carbon-nanotube-array-based (SWCNT) strain sensor was proposed and its fabrication technique was presented, which afforded more simple process than individual SWCNT-based sensor. A novel selective treatment of strain-based electrical breakdown was utilized to leave the SGS-SWCNTs with high gauge factor in the array. The SWCNT-array strain sensor were used for weighing experiment and...
Based on the analysis of the applicability of various fault location methods in railway automatic blocking and continuous transmission line (RABCTL), S-injection method is considered to be a feasible method. An advanced S- injection applied in fault location system is put forward. Based on the traditional S-injection, the technology of wireless sensor network is brought in. It can realize wireless...
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