This circuit is from an old Japanese publication of 1962. The circuit uses two batteries, one for the filaments of the tubes and the other one of high voltage for the plate circuits.
Found in a Motorola manual from the 1980s, this circuit uses components from the era. The circuit...
This circuit, which may have more inputs, consists of an optical OR gate using common...
Suggested by Amperex in a 1968 documentation, this circuit is based on TAA370, an integrated circuit...