This filter was found in Delco's 1965 documentation. It can be implemented with modern components according to the voltage and current to be regulated.
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...
Toshiba TCKE8xx eFuse IC Toshiba provides through Mouser Electronics circuits over current...
This active crossover filter was obtained from the component manual used. Below is the performance...