A High-Speed Josephson Latching Driver for a Superconducting Single-Flux-Quantum System to Semiconductor System Interface.

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  • Harada Naoki
    FUJITSU Limited, 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan
  • Yoshida Akira
    FUJITSU Limited, 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan
  • Yokoyama Naoki
    FUJITSU Limited, 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan

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  • High Speed Josephson Latching Driver for a Superconducting Single Flux Quantum System to Semiconductor System Interface

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Abstract

We have used a 2.5 kA/cm2 standard Nb junction technique to fabricate superconducting driver circuits and here present experimental results. The driver consists of 16 resistively shunted stacked junctions and an input junction. It is capable of converting a single flux quantum pulse to 10 mV at 3 GHz, and 7 mV at 10 GHz. The driver is thus a potential high-speed output interface between superconducting single-flux-guantum (SFQ) systems and room-temperature semiconductor systems.

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