The integrated circuit used in this application is uncommon, but equivalent operational ones can be used. The circuit is from the Signetics integrated circuits manual from 1972.
This circuit is from an old documentation but can be implemented with a BD136 for Q1 and 2N3055 for...
We found this circuit in Linear Technology Applications 1993. The maximum output current is 5 A...
This circuit requires an input current of only 20 fA (femto amps) which corresponds to a...