Timing jitter measurement of single-flux-quantum pulse in Josephson transmission line
Timing jitter measurement of single-flux-quantum pulse in Josephson transmission line
复制标题
约瑟夫森传输线中单通量量子脉冲的定时抖动测量
DOI：
10.1063/1.1650912
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发表时间：
2004
影响因子：
4
通讯作者：
N. Yoshikawa
中科院分区：
文献类型：
--
作者：
H. Terai;Zhen Wang;Yoshihito Hishimoto;S. Yorozu;A. Fujimaki;N. Yoshikawa
时间抖动是决定单通量量子电路速度和规模极限的一个重要因素。我们用一个简单的方法，使用2位移位寄存器的时间抖动估计。它是通过观察1-和2-模式操作之间的转换，同时改变时钟线的偏置电流来估计的。在时钟和数据线中具有较少数量的约瑟夫森结的移位寄存器中观察到急剧的转变，这表明存在有限的定时抖动。在设计的偏置电流下，每个约瑟夫森结的定时抖动估计为0.09 ps。温度依赖性支持定时抖动来自于热涨落。
Timing jitter is an important factor in determining the limit of speed and scale of single-flux-quantum circuits. We estimated the timing jitter by a simple method using 2-bit shift registers. It was estimated by observing the transition between 1- and 2-mode operations while changing the bias current to the clock line. A sharp transition was observed in the shift register with a smaller number of Josephson junctions in the clock and data lines, suggesting the existence of a finite timing jitter. The timing jitter per Josephson junction was estimated to be 0.09 ps at a designed bias current. The temperature dependence supported that the timing jitter comes from thermal fluctuation.