User:AlbertelliClyne/sandbox

The field-effect transistor (FET) is an electronic transistor device that uses an electric field to control the behaviour of the device by the application of a voltage to the gate terminal. The conductivity between the drain and source terminals is controlled by an electric field in the device, which is generated by the voltage difference between the source and the gate of the device.

FETs are also known as unipolar transistors and many different types of field effect transistors exist. Field effect transistors generally display very high input impedance at low frequencies.