高频异质结晶体管直流和交流模型及其验证

摘要

针对漂移扩散方程和能量平衡方程的解建立了SiGe HBT的直流和交流理论模型,综合考虑了速度饱和效应、基区和发射区的禁带变窄效应和复合效应,并与台面型SiGe HBT实验结果进行了比较,截止频率为10.5 GHz,电流增益为45,与理论结果基本符合.%Based on drift-diffusion equation and energy balance equation, a SiGe HBT DC and AC model was　established. In addition, the velocity saturation effect,base and mitter bandgap narrowing effect and the recombination　effect are included. Finally,the theory and mesa-type SiGe HBT experiment results were compared,the cut-frequency　is 10.5 GHz,the current gain is about 45 ,the theoretical results are consistent with experiment results.