using kirkoff laws with dependent current sources so I've uh got a large problem here it's actually so big that the circuit continues so this is sort of one circuit here and it's it is a monster I'll ...

It has long been known that the simple combination of a depletion-mode MOSFET (and before these were available, a JFET) and a resistor made a simple, serviceable current source such as that seen on ...

FET constant current sources use JFETs and MOSFETs to deliver a load current, which remains constant despite changes in load resistance or supply voltage. A FET constant current source is a type of ...