We found this circuit at Popular Electronics. The components are still current. Changes can be made to obtain higher voltages, as indicated in the second diagram.
Other series operational amplifiers, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
This TTL circuit was found in a 1978 technical documentation. The power must be supplied with 5 V....
We found this circuit in documentation from the 90s. The circuit uses components that are still...