This circuit was found in a Philips documentation from 1966. Its purpose is to drive the solenoid of an electric typewriter of the time.
We found this circuit in an old publication. The circuit can be implemented with modern equivalent...
Operational amplifiers used in this 80's circuit is not very common today, but the setting can be...
No information is given about the transformers in this circuit suggested by Motorola in a 1968...