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MOSFET

What is a MOSFET?

A MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a type of transistor that acts as an electronically controlled switch or amplifier. It uses an electric field applied to a gate terminal to control the flow of current between its source and drain terminals, with virtually no current flowing into the gate itself. MOSFETs are fundamental building blocks in digital circuits, power electronics, and integrated circuits due to their high switching speed, low power consumption, and excellent on/off characteristics.

Related Terms

Field Effect Transistor

FET

A Field Effect Transistor (FET) is a semiconductor device that controls current flow between two terminals (source and drain) using an electric field applied to a third terminal (gate). Unlike bipolar transistors, FETs are voltage-controlled devices with extremely high input impedance, making them ideal for amplification and switching applications. They consume virtually no input current and are commonly used in digital circuits, analog amplifiers, and power management systems due to their efficiency and fast switching characteristics.