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A new SPICE-type heterojunction bipolar transistor model for DC, microwave small-signal and large-signal circuit simulation

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3 Author(s)
Ke Lu ; Dept. of Electron. & Electr. Eng., Univ. Coll. Dublin, Ireland ; Perry, P. ; Brazil, T.J.

Accurate modelling of the microwave large-signal characteristics of Heterojunction Bipolar Transistors (HBTs) is extremely useful for microwave power applications of this device. This paper presents a new type of HBT large-signal model which is valid for DC, small-signal and large-signal AC modes of operation. The model may be used over a wide range of operating conditions and includes allowance for self-heating effects which are very important for HBTs. Through the use of several novel features, the model is differentiated from traditional Ebers-Moll or Gummel-Poon BJT representations. The new model is accompanied by a very simple parameter extraction process requiring only a series of conventional DC measurement and multi-bias point small-signal S-parameter measurements. The model is validated by independent power sweep measurements on HBTs from two different manufacturers.<>

Published in:

Microwave Symposium Digest, 1994., IEEE MTT-S International

Date of Conference:

23-27 May 1994