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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 60-GHz NbN single-flux quantum counter circuit
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A 60-GHz NbN single-flux quantum counter circuit

机译:60 GHz NbN单通量量子计数器电路

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摘要

A Josephson binary counter using single-flux quanta transitions of DC SQUIDs (superconducting quantum interference devices) has been fabricated using an eight-level NbN-based process. High-speed binary division has been demonstrated at 4.2 K, with single-cell counting observed at 60 GHz using the Josephson voltage-to-frequency relationship. Count rate was primarily limited by conservative process and design rules. The counter was designed for operation at 4.2 K. At 8-10 K, the beta /sub L/ of the SQUIDs would not allow operation, though the junction characteristics were good.
机译:使用八级基于NbN的工艺制造了使用DC SQUID(超导量子干涉器件)的单通量量子跃迁的Josephson二元计数器。高速二进制分割已在4.2 K下得到证明,使用约瑟夫森电压频率关系在60 GHz观察到单细胞计数。计数率主要受保守的过程和设计规则限制。该计数器设计为在4.2 K下运行。在8-10 K下,SQUID的beta / sub L /不允许运行,尽管结特性良好。

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