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.
Found in a documentation from the 90s, this circuit limits and amplifies a voice signal in the 800...
This circuit was found in documentation from the 90s. The operational amplifier is NE5514, which is...
We found this circuit in the August 1970 issue of Radio Elecronics magazine. It uses the CA3018...