This circuit was found in an American documentation from the 80's. The sensor is a special integrated circuit, uncommon in our times. There are modern equivalents.
This configuration is found in other LM317 manufacturer's manuals. It is a regulating circuit in...
The circuit presented was found in the Linear Applications Handbook of the National Semiconductoir of 1994....
We obtained this circuit from the 1977 National Semiconductor FET Databook. The frequency depends only...