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文中提出一个新的P—N結二極管电荷控制模型,在这个模型中分别采用时常数τ_F和τ_R来使正向电流I_F及反向电流i_R与存儲于基区的电荷Q联系起来。分析了正常开关运用的反向开关瞬态特性,这时存在恆流阶段(存儲阶段)和电流衰减阶段。也分析了过驅动开关运用的反向开关特性,这时不存在恆流阶段。导出了新的开关时間方程式。这些方程用可测量的器件参数τ_F、τ_R、C_j、外线路可变值I_F和I_R、以及一外线路参数R表示。所提出的模型可用于任何类型的P—N結二極管。文中还给出了用各种类型二極管所得到的实驗結果。实驗結果与理論完全符合。
In this paper, a new P-N junction diode charge control model is proposed. In this model, the time constant τ_F and τ_R are used to connect the forward current I_F and the reverse current i_R with the charge Q stored in the base region respectively. The transient characteristics of the reverse switch used in normal switching are analyzed. In this case, the constant current stage (storage stage) and the current decay stage exist. Also analyzed the characteristics of the reverse switch used in overdrive switches, when there is no constant current phase. A new switching time equation has been derived. These equations are expressed in terms of measurable device parameters τ_F, τ_R, C_j, outer line variable values I_F and I_R, and an outer line parameter R. The proposed model can be used for any type of P-N junction diode. The experimental results obtained with various types of diodes are also given. The experimental results are in good agreement with the theory.