This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according to the desired output voltage and current.
This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and...
This circuit is suggested by National Semiconductor in its Linear Applications Handbook. It makes...
The circuit shown is from the 1993 Motorola Linear Interface ICs. The power source may be common...