Metal-oxide semiconductor field effect transistor, referred to as Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET is a field-effector that can be widely used in analog circuits and digital circuits. MOSFET can be divided into two types of "N -type" and "P type" according to its "channel" (working carrier). It is usually also called NMOSFET and PMOSFET. Others include NMOS, PMOS, etc.