In fact, this circuit from the 60's applies to photographic printers of the time, timing the lighting of a 20 W lamp. The components are from the period.
This FET mixer in a common source configuration was found in a 1980s documentation. The circuit...
This circuit was found in the used integrated circuit manufacturer's manual. The table beside the...
A Popular Electronics from the 90's suggests this circuit that is based on a low voltage...