Grajal de la Fuente, Jesus ; Krozer, Viktor ; Campo, Alfonso ; SchüBler, Martin
(1999)
Performance limitations of power HBT devices.
In: Gallium Arsenide Applications Symposium. GAAS 1999, 4-5 October 1999, Bologna, Italy.
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Abstract
Selfheating and thermal coupling effects are the origin of the performance limitation of amplifiers with power HBTs. It is shown that an uneven temperature distribution in individual emitter fingers and between the fingers is responsible for the limitation. A design method is proposed, which improves the temperature drain and the device reliability.
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