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In this work we demonstrate a semi-empirical GaN HEMT model implemented in Verilog-A format. The model captures accurately the DC operation of test devices fabricated and measured at IMS CHIPS including the thermal effects. In addition, the off-state leakage current is physically modeled as a space-charge limited current prior to the onset of the physical breakdown. The dynamic current recovery of...
Temperature dependent substrate ramp measurements on AlGaN/GaN power high-electron-mobility transistors (HEMTs) are used to extract information on charge redistribution in the buffer structure as a function of substrate bias. The measurements are compared to a theoretical model, representing the ideal capacitive buffer stack. It is found that at room temperature some negative charge is stored in the...
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