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Partitioned-charge-based modeling of bipolar transistors for non-quasi-static circuit simulation

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2 Author(s)
Fossum, J.G. ; University of Florida, Gainesville, FL ; Veeraraghavan, S.

The concept of partitioned-charge-based (PC) modeling of bipolar transistors is developed and demonstrated, and shown to be fundamentally superior to conventional quasi-static charge-control modeling, the basis of the common (capacitance-based) Gummel-Poon (GP) equivalent circuit. SPICE transient simulations with PC and GP models are contrasted to show a first-order accounting for non-quasi-static (NQS) delay in the PC model which is not accounted for in the GP model. Additional model contrasts in the small-signal domain, compared with exact ac solutions, confirm the superiority of the PC model, the characterization of which is in fact no more tedious than that of the GP model.

Published in:

Electron Device Letters, IEEE  (Volume:7 ,  Issue: 12 )