866 research outputs found
Trap-assisted space charge limited transport in short channel MoS2 transistor
We present temperature dependent measurements of short channel MoS
field effect devices at high source-drain bias. We find that although the
characteristics are Ohmic at low bias, the conduction becomes space charge
limited at high and existence of an exponential distribution of trap
states was observed. The temperature independent critical drain-source voltage
() was also determined. The density of trap states was quantitatively
calculated from . The possible origin of exponential trap distribution in
these devices is also discussed.Comment: 5 pages, 3 figure
Compensation of Distribution System Voltage using DVR
A dynamic voltage restorer (DVR) is a power-electronic controller that can protect sensitive loads from disturbances in the supply system. In this paper, it is demonstrated that this device can tightly regulate the voltage at the load terminal against imbalance or harmonic in the source side. The behavior of the device is studied through steady-state analysis, and limits to achievable performance are found. This analysis is extended to the study of transient operation where the generation of the reference voltage of the DVR is discussed. Once the reference signals are generated, they are tracked using a switching band scheme. A suitable structure in which the DVR is realized by voltage-source inverters (VSIs) is also discussed. Particular emphasis to the rating of this device is provided. Extensive simulation results are included to illustrate the operating principles of a DVR
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