JFET transistor components make for an easy current source circuit fragment. Providing a certain amount of current that only varies a little bit over a range of voltages. The only JFET I have is the N channel depletion mode J310. Therefore it is the one I use in my demonstration circuits. According to the datasheet … Continue reading "JFET N Channel J310 Junction Field Effect Transistor – Idss and adjustable current source"