MOS Transistors
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Metal-Oxide-Semiconductor (MOS) transistors are the fundamental building blocks of modern electronics. They are used in a wide variety of applications, from computers and smartphones to cars and airplanes. MOS transistors are also used in a variety of sensors and actuators.
What is a MOS Transistor?
A MOS transistor is a type of field-effect transistor (FET). FETs are devices that control the flow of current between two terminals by applying a voltage to a third terminal. In a MOS transistor, the gate terminal is insulated from the source and drain terminals by a thin layer of metal oxide. This oxide layer prevents current from flowing between the gate and source/drain terminals, but it allows the gate voltage to control the flow of current between the source and drain terminals.
How do MOS Transistors Work?
When a positive voltage is applied to the gate terminal, it attracts electrons from the source terminal to the gate terminal. This creates a channel of electrons between the source and drain terminals, which allows current to flow. When a negative voltage is applied to the gate terminal, it repels electrons from the source terminal to the gate terminal. This creates a depletion region between the source and drain terminals, which prevents current from flowing.
