TECHNOLOGY ISSUES ON SUPERCONDUCTING DIGITAL-COMMUNICATION CIRCUITS AND SYSTEMS

We report the state of the art of superconducting network switching ci rcuits and system technology. Mainly, we describe our switching core c ircuits and challenges to demonstrate superconducting prototype system s. And also, we review other approach to perform the superconducting d igital communication briefly. In our switching core circuits, a ring-p ipeline architecture has been proposed and the component circuits of t he prototype chips have been fabricated and tested successfully. It is very important to demonstrate the prototype system in order to estima te the total performance of the system with superconducting devices. W e have designed a multi-processor system with a superconducting networ k as a prototype system to demonstrate an interprocessor network syste m.