The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other operational amplifiers. The power supply must be symmetrical.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...