We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994. The circuit can be adapted to use other operational amplifiers and the power supply must be symmetrical.
This 13.8 V transistorized power supply with a current capacity of 20 A has a protection system...
The circuit shown in the figure can generate signals of good intensity up to a frequency of 30...
Found in a 90s 303 Circuits, this circuit aims to provide a soft start for a low voltage halogen lamp....