This interesting circuit of an Electronic Design stores the highest voltage of two applied to its inputs. The circuit is from 1964 and can be adapted to use modern components.
This circuit with junction field effect transistors was found in documentation from the 1980s. The...
This ultra-low noise circuit was found in the May 1990 issue of Radio Electronics magazine. The...
The configuration shown is from the 1994 Linear Applications Handbook, published by National...