How Do Transistors Work? At its core, a transistor is an electronic gatekeeper. It controls the flow of electric current through a semiconductor material.

He does explain why PNP transistors don’t perform as well as corresponding NPN transistors, but they are still necessary sometimes. Once you get used to it, they are no problem to handle at all.

What does Nokia Bell Labs look like 75 years since the transistor’s invention? It’s responsible for the transistor, information theory, pioneering satellite work and more.