Based on the CA3161 and CA3162, this circuit was found in the July 1990 Radio Electronics magazine. The circuit is two digits only.
This circuit, which can be used as a shield, was found in a 1980s documentation. The circuit can be...
This circuit was found in a Radio Electronics magazine from November 1992. The components are from...
Found in a 1968 US publication, this circuit is designed to measure very weak signals. The...