In this section we will examine how the properties of extrinsic semiconductor and the behaviour of the PN junction, can be used to explain the
operation of some fundamental semiconductor devices. This section will just be an introduction to these devices, focusing on how the semiconductor
theory we have covered, relates to the principles of operation for each device. We will not go on to consider the operating characteristics of these
components, nor the circuits in which they are used. (This will be covered in studies of analogue and digital electronics.)
Also we will only look at the fundamental components, i.e. Diodes, Bipolar Transistors and Field Effect Transistors (FETs). As you progress in your studies you will come across other types of components, such as Triacs and Thyristors. However, the general principles discussed in this section, can be used to determine the particular operation of each of these devices.