Before revision: In field-effect transistors (FETs), a channel is a conducting area that forms in the transistor bulk under the gate under certain conditions, as when a voltage is applied to the gate .
After revision: (usually the gate-source voltage, Vgs )In field-effect transistors (FETs), a channel is a conducting area that forms in the transistor bulk under the gate under certain conditions, as when a voltage is applied to the gate .