A physics-based high-injection transit-time model applied to barrier effects in SiGe HBTs

Qingqing Liang, John D. Cressler, Guofu Niu, Ramana Malladi, K. Newton, D.L. Harame

IEEE Transactions on Electron Devices · 2002 · 16 citations · 12 references

Concepts

Abstract

A physics-based cutoff frequency model considering high-injection heterojunction barrier effects in SiGe HBTs is derived. Compared with other compact modeling approaches, the present model accurately captures the cutoff frequency behavior at very high current densities for SiGe HBTs with deep Si-SiGe heterojunctions. The model also offers better insight into the charge density distribution under Kirk and barrier effect in SiGe HBTs.

References

12