Suggested by General Electric in an old documentation, this circuit can use modern SCRs and the transformer has a voltage according to the rail and current of at least 3 A.
Found in Popular Electronics from the 1980s, this circuit can use more modern transistors such as...
This circuit is a utility that can be implemented with few components, without anything...
This circuit is from the Motorola LinearDatabook of 1990. It shows how it uses the LF355, 356 and...