Design Issues in Ultra-Fast UltraLow -Power Superconductor Batcher-Banyan Switching Fabric Based on RSFQ Logic/Memory Family (1997) [2 citations — 1 self]
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Abstract:
I present the results of the feasibility study of ultra-fast low-power superconductor digital switches based on Rapid Single-Flux-Quantum (RSFQ) technology. I have considered RSFQ-based crossbar, Batcher-banyan, and shared bus switching fabrics, and the complexity and performance parameters of these circuits have been estimated. The results show that the proposed RSFQ digital switches with overall throughput of 5:76 Tbps operating at an internal clock frequency of � � 60 GHz and dissipating as low as 45 mW power per fabric could effectively compete with their semiconductor and photonic counterparts. The most compact and low-power architecture, the Batcher-banyan switching fabric with TDM switching elements, has been selected for implementation and will be discussed in the paper in detail. 1 RSFQ and Switching Fabrics The rapid increase in the speed of communication networks requires faster digital switching circuits. The only way the traditional semiconductor electronic technologies (Bi-CMOS, GaAs MESFET) can handle hyper-gigabit frequencies is broad parallelizing leading to high power consumption. Emerging photonic technologies, while allowing much higher clock rates, still dissipate enormous power. Consider an example: a 96 \Theta 96 delta-type multistage network implemented in GaAs with 2:5 GHz clock frequency, dissipates � � 350 W; the same network with 10 GHz clock frequency dissipates � � 3 kW (rough estimates using data from [2], [8]), and the same network implemented in RSFQ
