MOSFET as an amplifier

A MOSFET amplifier's primary objective, or the objective of any amplifier for that matter, is to generate an output signal that is an exact replica of its input signal but magnified in amplitude. A MOSFET device must be biased to operate inside its saturation area in order to function as an amplifier. This input signal may be either a current or a voltage.
In this MOSFET amplifier video, we have studied the n-channel enhancement-mode MOSFET, one of the two main types of enhancement-mode MOSFETs. Because it can be operated with positive gate and drain voltages relative to the source, unlike the p-channel PMOS, which can only be done with negative gate and drain voltages relative to the source, the MOSFET is frequently referred to as an NMOS.
A MOSFET device's constant-current region above its threshold voltage, Vth, is known as the saturation region. Since the drain current is referred to as saturated, once correctly biased in the saturation area, the gate-to-source voltage, VGS, determine how much the drain current changes instead of the drain-to-source voltage, Vds.
In contrast to a depletion-mode MOSFET, an enhancement-mode MOSFET's electrostatic field, which is produced by applying a gate voltage, increases the channel's conductivity.