We found this circuit in the 1990 Motorola Linear Databook. The circuit must use symmetric source and has 10times the voltage gain.
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...