This circuit was suggested by General Electric / RCA in a 1980s documentation. The components are of the time and the circuit must be powered by symmetrical source.
This conventional power supply circuit with the LM317 was found in a 1987 publication and its...
This circuit was found in an 80's EDN. The circuit uses a current common CMOS, the 4093 powering...
This detector is from the 1990 Motorola Dataar Databook, but can be adapted to work with more...