A compact tunneling current and collector breakdown model

Analytical models for base-emitter tunneling current and base-collector breakdown (weak avalanche) are presented. The new formulations are quite simple, contain only two additional model parameters each and incorporate the respective depletion capacitance models. Since the formulations are physics-based, they are easily extended towards lateral scaleability and temperature-dependence. The formulations can be directly implemented and deployed in compact BJT models for circuit simulation, and allow a straightforward parameter extraction. The models show good agreement with measured results over bias and temperature for device structures with different geometries