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The most relevant techniques proposed in the literature for the extraction of the self-heating thermal resistance of bipolar transistors from measurements of their DC electrical characteristics are analyzed and compared for both GaAs HBTs and silicon BJTs. A simple procedure is presented to accurately evaluate the thermal resistance of silicon BJTs with non-negligible Early effect, for which traditional...
A two-dimensional theoretical analysis of bipolar transistor operation under reversal base current conditions is presented. This model describes the current crowding effect occurring when the device is biased above the open-base breakdown voltage BVCEO, also known as the ldquopinch-inrdquo effect. In addition, the model clarifies, for the first time, the physical origin of instability phenomena occurring...
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