The operational amplifier used in this application is uncommon today. This Raytheon circuit can be designed with equivalent operational and the power supply must be symmetrical.
This simple low current circuit was found in a Radio Electronics magazine from August 1960. The...
Found in 1967 General Electric documentation this circuit appears elsewhere in this section. SCRs are...
Found in American documentation from the 90s, this circuit uses a high voltage relay and has no...