This circuit is used in transceivers, enabling input selection by diode switching through polarity reversal. The circuit is from an old American documentation on telecommunications.
We found this circuit in an article in Electronics Now magazine from March 1996. The frequency is limited...
This circuit is designed to measure very weak currents, in the nanoampères range, using the 1 V...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...