A Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is a type of FET widely used for switching and amplifying signals in electronic devices. It has four main terminals:
1. Source (S) – Where the current enters.
2. Drain (D) – Where the current exits.
3. Gate (G) – Controls the flow of current between source and drain.
4. Body (B) – Often connected to the source in practical circuits.
The MOSFET operates by using an electric field to control the current flow between the source and drain. It has an insulating layer (usually silicon dioxide) between the gate and the channel, which allows the gate to control the current with very little input power.
There are two main types of MOSFETs:
- N-Channel MOSFET: Current flows when a positive voltage is applied to the gate.
- P-Channel MOSFET: Current flows when a negative voltage is applied to the gate.
MOSFETs are highly efficient, consume less power, and switch faster than other transistors, making them ideal for applications in computers, power electronics, and digital circuits.
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