This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on the XR2206, which is not a component found easily today.
Agostgo 2016 - Mouser Electronics is already providing the new TPS3890 voltage supervisors from...
This configuration can be applied to other operational amplifiers to increase the current...
This PWM control circuit was found in an old documentation, but appears elsewhere on this site...