In all types of them, the current flows along a narrow channel whose effective electrical diameter can be varied by the application of voltage to a control electrode.
In all types of them, the current flows along a narrow channel whose effective electrical diameter can be varied by the application of voltage to a control electrode. In the junction type, the gate is made of the type of semiconductor opposite to the substrate, and the "junction" itself refers to the boundary between the gate and the channel. More famous is the metal oxide type, in which the gate is a piece of metal isolated from the channel by an oxide layer; in both cases, current flows from source to drain. FTP, identify this common type of circuit element which has mostly supplanted bipolar junction transistors in home electronics.
In all types of them, the current flows along a narrow channel whose effective electrical diameter can be varied by the application of voltage to a control electrode.
FET (or Field Effect Transistor)