Diodes and Transistors
Magno Urbano · 2019
This chapter examines diodes and transistors, the first two practical applications coming from the invention of N-type and P-type materials. When a diode is forward biased, current flows and behaves, roughly, like a closed switch or like a resistor of small value. However, if reverse biased, a diode will block current flow and behave like an open switch or a resistor of large value. The chapter shows the symbol used for diodes. The chapter also shows that transistors are formed by three parts, called collector, base, and emitter. The collector and the emitter are the N-type materials and the base is the P-type material. There is another kind of transistor called PNP transistor. The base is the point where both elements connect. The chapter also shows the NPN structure.