Regardless of type NPN or PNP-type tubes, the internal transistor has three areas, namely, the launch area, base, collector area, the three areas form two PN junction.
无论npn型还是PNP型管，三极管内部均有三个区、即发射区、基区、集电区，三个区形成两个PN结。
2
The base current and the junction leakage current increase, while the collector current and the breakdown voltage decrease for SiGe HBTs after radiation.
辐照后基极电流、结漏电流增大，集电极电流、击穿电压减小。
3
At constant bias current, the simulation shows significant enhancement in optical bandwidth due to moving the quantum well in the direction of collector-basejunction.