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- TL;DR Summary
- Constant current source are quite difficult to be built.In this thread we discuss how.

I have been trying for a long time to build a costant current source which I know is impossible to keep the current exactly the same but as much as possible. This is what I have done so far:

The operation is very simple . If VCC is increased the VAC is increased a little bit. When VA is increased a little bit Rm is reduced a little bit and VB is increased a little bit-> current through RL remains more costant.I am using the phrases 'a little bit'because I can't calculate . Any help really appreciated.

The operation is very simple . If VCC is increased the VAC is increased a little bit. When VA is increased a little bit Rm is reduced a little bit and VB is increased a little bit-> current through RL remains more costant.I am using the phrases 'a little bit'because I can't calculate . Any help really appreciated.