1 Answer
In a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), the gate plays a crucial role in controlling the flow of current between the drain and the source.
Here’s how it works:
So, the gate essentially acts like a switch that controls the flow of current in the MOSFET by manipulating the electric field in the channel.
Here’s how it works:
- Control of current: The gate is the terminal that controls whether the MOSFET conducts (allows current to flow) or not. It doesn't directly conduct current; instead, it influences the behavior of the channel between the drain and source.
- Voltage application: A voltage applied to the gate creates an electric field that affects the channel between the drain and the source. In a n-channel MOSFET, when a positive voltage is applied to the gate, it attracts electrons to the channel, making it conductive and allowing current to flow from the drain to the source. In a p-channel MOSFET, a negative voltage is applied to create conductivity.
- Switching action: By varying the gate voltage, you can turn the MOSFET "on" (when the gate voltage is sufficiently high for n-channel or low for p-channel) or "off" (when the gate voltage is too low to create conductivity).
So, the gate essentially acts like a switch that controls the flow of current in the MOSFET by manipulating the electric field in the channel.