基极中空穴的密度小于发射极和集电极中自由电子的密度。
The density of holes in the base is less than the density of free electrons in the emitter and collector .
基极总是比发射极和集电极薄得多。
The base region is always very much narrower than the emitter or collector regions .
截止频率是影响共发射极、共基极和共集电极电路频率特性的重要因素。
Cut off frequency is the main factor influencing frequency properties of electrode circuits of common emitter, common base and common collector.
发射极注入最容易导致烧毁，集电极注入次之，基极注入相对不易导致烧毁；
The simulation results show that the emitter injection is easier to burnout the BJT than the collector injection, and the base injection is relatively difficult.
辐照后基极电流、结漏电流增大，集电极电流、击穿电压减小。
The base current and the junction leakage current increase, while the collector current and the breakdown voltage decrease for SiGe HBTs after radiation.
答：emitter晶体管有三个电极，即发射极，基极和集电极。
A transistor has three electrodes, the emitter, the base and the collector.
例如，晶体管是可控的开关，但它在集电极和发射极之间是定向的，并且在基极和发射极之间是配合控制的。
For example, a transistor is a controllable switch, but it is directional between the collector and emitter, and it has interactive control between the base and emitter.
此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。
In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.
此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。
In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.
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