The Field Effect Transistor

The Field Effect Transistor
With the field effect transistor, the current through a socalled
channel is controlled by means of an electric field.
Hence, field effect transistor. This principle is similar to the
operation of the nowadays rarely used vacuum tube. With
respect to the vacuum tube, the three terminals of the field
effect transistor are called:
Source, which emits the electrons
Drain, which collects the electrons
Gate, which controls the electron flow
The electric field is generated by a voltage. Furthermore,
since only one kind of carrier, e.g. electrons, is involved in
the operation, the field effect transistor is also called
unipolar transistor.