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.
This stage of two complementary transistors was found in a 1977 Radio Handbook. Transistors admit current...
This circuit is from a manual of linear integrated circuits of the 80s. The operational is of the...
Found in Popular Electronics from the 90s, this circuit reaches a few tens of megahertz. L1, C1...