Junction Field Effect Transistors (JFETs) are commonly used as a current source/sink.
Connecting the gate directly to the source provides the Idss. Which is the maximum current that a particular JFET will allow to flow through it.
A resistor between the gate and source will lower the amount of current based on the Idss and the amount of resistance used.
JFETs come in N channel and P channel. The J310 is relatively common N channel JFET.
N channel gate arrow points into the component schematic, whereas the P channel JFET schematic symbol points out of the schematic symbol.
To support this site, check out the following links:
- Become a Patron!
- Check out my YouTube videos! https://www.youtube.com/c/Electronzap/videos
- Products I used in my videos or otherwise think look like a good buy. As an Amazon associate, I earn from qualifying purchases. https://www.amazon.com/shop/electronzapdotcom
- Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.
- Electronzap is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.