When the gate is at zero (V GB) the device is usually ON, therefore, it functions as a load resistor for given logic circuits. The gate terminal is barred from the primary current pathway thus, no current leaks into the gate.ĭepletion state − This requires the gate-source voltage (V GB) to switch the component OFF. The isolation of the controlling gate raises the resistance of the MOSFET to extremely high levels (almost infinite). MOSFET has a thin layer of silicon dioxide, which acts as the plate of a capacitor. At the same time, it delivers a high current load of more than 50 Amperes.
Compared to the regular transistor, a MOSFET needs low current (less than one mill-ampere) to switch ON.
It is the most common device in circuits that are both digital and analogue. Since these two main terminals are usually interconnected via short circuit, only three terminals are visible in electrical diagrams. It has four terminals namely source (S), Drain (D), Gate (G) and Body (B).The MOSFET’s body is normally connected to the terminal of the source(S), which results in three-terminal device similar to other field effect transistors (FET). Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is a type of transistor used to switch electronic signals.
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