This rapid response amplifier uses an integrated one that is not common today but can be implemented with modern equivalents. The circuit is from an 80's manufacturer documentation.
With an 18 V input, this regulator was found in Philips documentation from the 60's. The...
We found this circuit in an English documentation from 1980. The circuit can be assembled with the...
This configuration was found in an English magazine from 1965. It is valid for any junction FET. The...