SUPERCONDUCTIVE CROSSBAR SYSTEM FOR COMMUNICATION APPLICATIONS

This paper reviews current efforts toward the integration of a high-sp eed crossbar switch for digital communication applications. This syste m is an intelligent switching matrix for 128 inputs and 128 outputs, e ach capable of 2 Gbs (10(9) bits per second). An array of Josephson ju nction integrated circuits are interconnected with the use of a superc onductive multichip module maintained at 4.2 K. This module is connect ed to room-temperature electronics by means of flexible cables, each c ontaining impedance-matched microstrip transmission lines. Room-temper ature interface electronics will permit interconversion between standa rd level input/output signals and Josephson junction logic levels.