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Analysis of avalanche regime in InP HBT's using physical simulation implementation in a DC model

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7 Author(s)
Maneux, C. ; CNRS Univ. Bordeaux, Talence, France ; Martin, J.-C. ; Labat, N. ; Touboul, A.
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This paper deals with the investigation of collector current Ic increase in InP/InGaAs/InP HBT designed for rapid digital signal processing in optical fibre telecommunication systems. Indeed, at high base-collector voltage, carrier generation by impact ionization as well as carrier tunnelling mechanisms in the multi-layer collector initiate Ic increase previous to the avalanche regime. Then, the characterisation of DC operation at low level injection allows to extract parameters which are included in a Gummel-Poon model modified to consider the impact ionisation influence. The physical simulation leads to identify parasitic elements as a current source accounting for carrier multiplication.

Published in:

Industrial Technology, 2004. IEEE ICIT '04. 2004 IEEE International Conference on  (Volume:3 )

Date of Conference:

8-10 Dec. 2004