MOSFET is a type of FET with an insulated gate that can amplify or switch electronic signals. It was invented in 1959 by Mohamed Atalla and Dawon Kahng at Bell Labs and is widely used in digital circuits. Although the MOSFET is an advanced form of FET and operates with the same three terminals as a FET the internal structure of the MOSFET is really different from the general FET. MOSFET Basics What Is a MOSFET ? Metal Oxide Silicon Field Effect Transistors commonly known as MOSFETs are electronic devices used to switch or amplify voltages in circuits. It is a voltage controlled device and is constructed by three terminals. The terminals of MOSFET are named as follows: Source Gate Drain Body The figure shows a practical MOSFET . MOSFET Construction The circuit of MOSFET is typically represented as follows: The p-type semiconductor forms the base of the MOSFET . The two ... MOSFET is one of the most important and widely used transistors. MOSFET full form Metal Oxide Semiconductor Field Effect Transistor. There are various types of Field Effect Transistors, and MOSFET is one of them. MOSFET is a very important and useful device due to its ultra-fast switching characteristics and high efficiency.