The Metal Oxide Semiconductor Field Effect Transistor (“MOSFET”, or, in short “MOS”) is the key building block of all the circuits that will be studied in the book. In this chapter, we provide a concise introduction to the device.
To make the material accessible also to readers with little back-ground in electronics, we start reviewing a few concepts of semiconductor physics that are essential to understand the working principles of the MOSFET. A broader treatment of these notions can be found in standard textbooks on semiconductor devices, such as [1] and [2]. In the central part of the chapter we examine the most important terms contributing to the transistor threshold voltage and we derive the key relationships ...
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