Type of transistor commonly used in amplifiers and other electronic circuits, the MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) places a metal conductor between two semiconducting materials (one negative n-type and one positive p-type) and generates varying levels of amplification by applying a small current to the conductor. The MOSFET works similarly to a vacuum tube (a triode tube used for amplification). As current is applied to the conductor, a greater amount of energy is induced to flow from one semiconductor to the other resulting in amplification.