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Large-signal modeling of self-heating, collector transit-time, and RF-breakdown effects in power HBTs

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4 Author(s)
Ce-Jun Wei ; Lehigh Univ., Bethlehem, PA, USA ; Hwang, J. ; Ho, W.-J. ; Higgins, J.A.

A large-signal heterojunction bipolar transistor (HBT) model has been developed which includes self-heating, collector transit-time, and RF-breakdown effects. The model has a compact form which is based on a compromise between accuracy and utility. As such, the model can be readily extracted and verified with the aid of RF waveform measurements. Using the model in simulations, it was found that RF breakdown was dependent on base biasing and loading conditions. Therefore, with proper circuit design, the maximum output power of the HBT can significantly exceed the limit of open-base breakdown voltage

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:44 ,  Issue: 12 )

Date of Publication:

Dec 1996

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