This JFET amplifier stage was found in the Encyclopedia of Electronic Circuits Volume 5 from 1995. Any JFET can be used and the bias controlled externally.
Featuring low output impedance and high input impedance, this configuration was found in a 1980s...
In the figure we have a TTL logic interfacing circuit as CMOS logic using a 6N139 optocoupler...
We found this circuit in an English documentation from 1989. The integrated circuit used is not...