Hello I am a newbie to electric circuits and I need to build a constant current source to drive continuous current into a chip. Someone told me to use a current mirror to generate this current source, but I have a few questions regarding this. My first question is how a current mirror differs from a norml constant current source with a transistor and LED. I found schematics of this type of constant current source and it seems farily simple. Also, in the schematics of these current mirrors, I am confused where to get the current output from. For example, if I need 50mA current, how do I design this current mirror to generate that, and where in the circuit is the output that I connect to the input of my chip? Can someone please explain this to me? Thank you for all your help.