High gain, but not easy to control (18-Transistors)

[@mohammadtoficmohammad3594]

thank you very much

[@paulpaulzadeh6172]

Is transistor voltage control or is it current control ¿?

[@AyazMehmood-yk5vc]

both, as Ic = beta*Ib and Ic = gm*vbe.

[@isahilliogluu]

The BJTs are current controlled current controller, while the MOSFETS are voltage controlled current controller.

[@abhijithas9976]

Input Base current control output collector current so current controlled device

[@sebastianroubert7543]

i don't understand why you say it functions really well as a current source. like you say, the same current level can be achieved by many voltages at many different temperatures but how is this useful? if its so hard to control, then its not a great current source, right?