npn-type transistor 负一正一负型晶体管
Taking a sensor of switch - output type NPN for example, its structural characteristic of the load driving unit and the driving pattern is introduced in this paper.
本文以三线制npn式开关量输出型传感器为例，介绍了传感器的负载驱动单元的结构特点及驱动方式。
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。
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