A diagram of an n-channel JFET. As the negative gate ... We have an amplifier. A simple FET radio receiver circuit showing FET biasing. The gate is biased at ground potential through the inductor ...
P-FET, positive source. N-FET, negative source. Once you got a FET, there’s a few ways to put it into a circuit. If you’re switching a 3.3 V power rail and your microcontroller is 3.3 V ...