FET

Field Effect Transistor

The FET consists of a semiconductor channel with electrodes at either end referred to as the drain and the source. A control electrode called the gate is placed in very close proximity to the channel so that its electric charge is able to affect the channel. The semiconductor channel where the current flow occurs may be either P-type or N-type. So there are two types or categories of FET known as P-Channel and N-Channel. FETs are also known as unipolar transistors as they involve single-carrier-type operation.