PN结对交流信号相位的影响  

Influence of PN junction on phase change of alternating current signal

作　　者：茅卫红[1] 侯清润[1] 陈宜保[1] 张慧云[1] 陈宏[1] 何元金[1] 

机构地区：[1]清华大学物理系,北京100084

出　　处：《物理实验》2003年第8期6-8,12,共4页Physics Experimentation

摘　　要：交流小信号被 PN结和电容分压 ,且电容值远远大于 PN结电容值时 ,大电容两端的电压是很小的交变电压 ,该信号的相位与 PN结的内阻 (正向 )有关 .把 PN结当做一个电容和一个电阻并联 。The voltage of AC signal is divided into the voltages of PN junction and capacitor, and when the capacitance of the capacitor is far larger than that of the PN junction, the output voltage of the capacitor is very small and its phase is related to the forward resistance of the PN junction. If the PN junction is considered as parallel connection of a capacitor and a resistance, the above mentioned phenomenon can be interpreted qualitatively.

关 键 词：PN结 交流信号 相位 电容分压 电容值 交变电压 半导体 

分 类 号：O475[理学—半导体物理]