This flexing generates a negative potential at the feedback tab, which feeds back to the base of the transistor.
这个弯曲在反应标记上产生负电压，其反过来为晶体管的基极供电。
2
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。
3
With the base grounded, transistor Q4 is a very high impedance.