Abstract
A Tandem-Banyan network switch (TBNS) based on superconductor single-flux-quantum technologies is described. Its switching core consists of multiple Banyan networks and transmission checkers (TMCs) connected sequentially. Numerical simulation demonstrated that the maximum throughput of TBNS is much higher than that of the input-buffer-type Batcher-Banyan network switch, while the amount of hardware is comparable with that of a Batcher-Banyan network switch. The two-bit code extraction part of the address decoder of the TMC circuit was designed and implemented using the SFQ cell library developed for NEC Nb standard fabrication process. The correct logic operation was experimentally observed with a bias margin of around ±10%. This switch is suitable for managing the huge amount of data traffic that will be carried in future backbone networks.
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