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58问答库 > 已知晶体管三个电极电流,怎么判断pnp还是npn型三极管？

已知晶体管三个电极电流,怎么判断pnp还是npn型三极管？

2025-03-15 03:37:50

推荐回答（2个）

回答（1）：

用指针式万用表电阻档，1、黑笔接基极，红笔接集电极或发射极，电表指针偏转，红笔接基极，黑笔接集电极或发射极，电表指针不动的为NPN型管。，2、红笔接基极，黑笔接集电极或发射极，电表指针偏转，黑笔接基极，红笔接集电极或发射极，电表指针不动的为PNP型管。

回答（2）：

根据3个电流的方向找出ebc，再看电流是从b流向e还是从e流向b判断pnp/npn。

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