There is no direct connection present between the gate and the channel. The MOSFET has three connections Drain, Gate, and Source.
In the below image, a basic N-channel MOSFETs internal construction is shown. The linear amplification occurs when we bias the MOSFET in the saturation region which is a centrally fixed Q point. So, for a linear small amplifier, MOSFET is an excellent choice. MOSFET provides very high input impedance and it is very easy to bias. Other than the pin configuration, BJT needs current for operation and MOSFET needs voltage. Depending on this gate voltage we can change the conductivity and thus we can use it as a switch or as an amplifier like we use Transistor as a switch or as an amplifier.īipolar Junction Transistor or BJT has base, emitter, and collector, whereas a MOSFET has gate, drain and source connection. The gate voltage determines the conductivity of the device.
MOSFET stands for Metal Oxide Field Effect Transistor, which has a gate. MOSFET is basically a transistor which uses field effect.
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