Technology Related Timing Jitter in Superconducting Electronics
Technology Related Timing Jitter in Superconducting Electronics
复制标题
超导电子器件中与技术相关的定时抖动
DOI：
10.1109/tasc.2007.901334
复制
发表时间：
2007
影响因子：
1.8
通讯作者：
F. H. Uhlmann
中科院分区：
文献类型：
--
作者：
T. Ortlepp;F. H. Uhlmann
基于约瑟夫森结的数字超导系统一般采用同步定时策略。今天，它最有前途的应用之一是高速和高动态范围的信号检测。数字信号采集系统应该具有高分辨率以及具有公知的恒定时间周期的短采样间隔。热噪声引起的短期时钟波动（时钟抖动）可能会严重干扰系统的运行，因为这会导致时序约束违反。时间周期的这种不确定性目前是对基于MEMS电子器件的快速信号感测系统的进一步改进的强烈限制。最近，一些理论和实验研究描述了简单电路中的定时抖动，如约瑟夫森传输线。在所提出的工作中，我们分析了不同的快速单通量量子（RSFQ）电子制造技术，并预测其定时抖动的随机微分方程的数值解。我们得到了一个非常好的协议，我们的模拟数据和最近的实验结果。
Digital superconducting systems based on Josephson junctions make generally use of the synchronous timing strategy. Today, one of its most promising applications is the high speed and high dynamic range signal sensing. A digital signal acquisition system should have a high resolution as well as a short sampling interval with a well known and constant time period. Short term clock fluctuations (clock jitter) induced by thermal noise can significantly disturb the system operation due to hazards of timing constraint violations. This uncertainty in the time period is currently a strong limitation for further improvements of fast signal sensing systems based on superconductive electronics. Recently, several theoretical and experimental studies describe the timing jitter in simple circuits, like Josephson transmission lines. In the presented work, we analyse different fabrication technologies for rapid single flux quantum (RSFQ) electronics and predict their timing jitter by the numerical solution of stochastic differential equations. We obtained a very good agreement between our simulation data and recent experimental results.