Question

How do MOSFETs work?

Answer 1

MOSFETs:

1. In a field-effect transistor (FET with an insulated gate), known as a metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET), the voltage controls the device's conductivity.
2. Signals can be switched or amplified using it.

MOSFET Operation:

1. The MOS capacitor is necessary for a MOSFET to function. The main component of a MOSFET is a MOS capacitor. Between the source and drain terminals is the semiconductor surface beneath the oxide layer.
2. By using either positive or negative gate voltages, it can be converted from p-type to n-type.
3. When a positive gate voltage is applied, the holes beneath the oxide layer are repelled and pushed downward together with the substrate.
4. The bonded negative charges connected to the acceptor atoms are found in the depletion zone. The channel is established as the electrons arrive.
5. Additionally, electrons from the $n+$ source and drain regions are drawn into the channel by the positive voltage.
6. Now, if a voltage is supplied between the drain and source, the current between the source and drain flows freely, and the gate voltage regulates the channel's electron population.
7. A whole channel will form beneath the oxide layer if a negative voltage is applied.