Eventually, silicon arrived, and vacuum tube logic was replaced with diode and transistor logic ... diode-only AND gate is shown in the picture above. When all inputs are positive, a current ...

The four-layer diode was the key to William Shockley's plan to revolutionize AT&T's phone system. It was a great device in theory, but not in practice -- at least not at the time when Shockley ...

Philco is expected to be in production shortly on preliminary transistor-diode “logic pacs.” Sperry Semiconductor Div. is in pilot production on Semi-Net NOR circuits in TO-5 cases.