Determination of channel temperature of AlGaN/GaN HEMT by electrical method

In this paper, the linear relationship of forward Schottky junction voltage of AlGaN/GaN HEMT with temperature was investigated. It was used as temperature sensitive parameter to determine the channel temperature at its normal working state by fast switch circuit technique. The regress of tested data was used to reduce the scatter error too. The thermal resistance constitution was extracted from the transient heating response curves.