Abstract
The drain current of a triodelike JFET exhibits both positive and negative temperature dependence, depending on the current density. For drain current smaller than ∼5 A.cm-2, the thermionic-injection mechanism prevails, leading to the positive temperature coefficient. On the other hand, a space-charge-limited current flows in the case of current density larger than ∼10 A.cm-2, resulting in nearly T-1dependence due to the mobility decrease.

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