Bipolar Junction Transistors, or BJT's, have been around for decades and are a fundamental portion of modern electronics and computing. For something as simple as two back-to-back PN junctions, these can be difficult to understand how they actually work at the semiconductor level. After laying the foundation for how they're built, we use some basic animations to demo how the electrons and holes move within the BJT to hopefully give you a more intuitive feel for what's going on when you apply a voltage at the different nodes. If this doesn't make sense - go check out our other intermediate electronics tutorials about semiconductors and PN junctions. I also highly recommend reading JB's written tutorial here for more in-depth information: [ Ссылка ]
Table of Contents:
0:00 Introduction
0:23 Introduction to the bipolar junction transistor
0:41 The different physical regions of a bipolar junction transistor
0:54 The two junctions that are created in NPN and PNP interfaces
1:29 How a BJT is configured to be an amplifier
1:57 Simplified animated demonstration of how the electrons flow through the different portions of an NPN BJT
3:13 Verbal overview of how a PNP compares to the animated example of the NPN version
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