MOSFET (Metal Oxide Semiconductor Field Effect Transistor) is a type of transistor which is used for switching the electronic signals. It consists of four terminals namely; source (S), Drain (D), Gate (G) and Body (B). MOSFET’s body will be usually connected to the terminal of the source(S), which leads to three-terminal device related to other field effect transistors (FET). As these two main terminals are generally interconnected using short circuit, only three terminals will be visible in the electrical diagrams.
MOSFET is an ordinary device used in most of the circuits which are both digital and analogue. In comparison with regular transistor, MOSFET requires less current (less than one mill-ampere) for switching ON. Simultaneously, it will deliver a high current load of more than 50 Amperes.
MOSFET will have a thin layer of silicon dioxide which will be acting as the plate of a capacitor. Controlling gate isolation will increase the resistance of the MOSFET to exceptionally high levels. Gate terminal will be barred from the primary current pathway and therefore no current will be leaked into the gate.
Where, D − Drain; G − Gate; S − Source; and Sub − Substrate
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