Brief N channel JFET current sink circuit – J310 constant current source

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JFETs have a certain amount of steady current that passes through drain to source when the gate is connected directly to both the source and ground (Idss).

Simple N channel JFET current sink schematic diagram is by electronzap electronzapdotcom
Simple N channel JFET current sink schematic diagram is by electronzap electronzapdotcom

The voltage doesn’t determine the current flow as long as it is high enough to meet all of the power needs without over heating anything. Adding resistance from the source to ground lowers that amount of current.

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Quick N channel JFET current sink using J310 Junction Field Effect Transistor electronics I source

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  • 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.