This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current equivalents can be experienced. The graph with the circuit performance is given next to the diagram.
This circuit is suggested by the Texas Instruments Linear Circuits Applications, based on the FET...
In the figure we have the way to use a zener instead of a filter capacitor. The zener can have the...
Found in an American publication from 1968, this circuit can be made based on a TIP42 that must be...