IEEE Transactions on Microwave Theory and Techniques · 2002 · 12 citations · 17 references
EngineeringElectrical EngineeringMicroelectronicsSemiconductor DevicesSemiconductor MaterialsBipolar Junction TransistorsCarrier TransportDevice ModelingHigh-frequency Semiconductor DevicesMicrowave Semiconductor DevicesSemiconductor PhysicsCurrentsHeterojunction Bipolar TransistorsLarge-signal BehaviorLarge-signal Device ModelingLarge-signal ModelingSaturation EffectsSelf-heating EffectsSemiconductor Device Modeling
High-current effects in InGaP/GaAs heterojunction bipolar transistors (HBTs) were modeled and characterized. In addition to the self-heating effect, high currents were found to degrade large-signal performance mainly through Kirk and quasi-saturation effects. New formalisms in terms of base transit time and base-collector diffusion capacitance were used to modify the conventional Gummel-Poon model. This new model was verified against large-signal characteristics measured at 2 GHz. The validity of the new model for HBTs of different emitter geometry was also explored.
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