An approach to determine cutoff frequency and maximum oscillation frequency of common emitter heterojunction bipolar transistor

Ao Zhang, Jianjun Gao

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Analytical expressions for the short-circuit current gain and unilateral power gain of common emitter heterojunction bipolar transistor (HBT) are presented in this paper. These expressions are derived from a simplified π-type small signal equivalent circuit model, which takes into account the influence of the extrinsic resistances and base-collector capacitance distributed nature. Good agreement is obtained between measured and calculated results for both two indium phosphide (InP) HBT devices and a gallium arsenide (GaAs) HBT device over a wide range of bias points.

Original languageEnglish
Article numbere2545
JournalInternational Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Volume33
Issue number3
DOIs
StatePublished - 1 May 2020

Keywords

  • heterojunction bipolar transistor
  • parameter extraction
  • short-circuit current gain
  • small signal model
  • unilateral power gain

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