We found this circuit in the 1982 SGS linear integrated circuit manual. The L149 is not common today and the circuit can be implemented with equivalents.
This circuit shows how to simulate a high-performance diode with two diodes. The circuit is from a...
We find this circuit in an American 1980s documentation. The circuit can still be assembled...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...