...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Measurement Science & Technology >Analog-to-digital conversion for low-frequency waveforms based on the Josephson voltage standard
【24h】

Analog-to-digital conversion for low-frequency waveforms based on the Josephson voltage standard

机译：基于约瑟夫森电压标准的低频波形的模数转换

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A waveform synthesizer adopting a superconductor-normal metal-superconductor junction array has been developed, which can generate arbitrary stepwise waveforms with a number of quantum-voltage steps up to 1 V level amplitude. As an application of the synthesizer, we have built a sampling voltmeter that measures the differential voltages between a sinusoidal waveform produced by a semiconductor-based ac source and the Josephson waveforms. We carried out extensive sampling measurements for a 50 Hz sine wave with 1 V amplitude, applying sampling apertures in the range of 55 (mu)s <= t_(a) <= 130 (mu)s and using Josephson waveforms with 32, 60, 80 and 100 quantum steps. From the measurements, the amplitude of the ac waveform was determined with a type A uncertainty (k velence 2) of 0.15 (mu)V. Also, we elucidated how the phase jitter in the ac waveform is reflected in the overall uncertainty for the measurements. The type B uncertainty due to the jitter is at least one order of magnitude smaller than the type A uncertainty.
机译：已经开发出一种采用超导体-正常金属-超导体结阵列的波形合成器，该波形合成器可以生成任意阶跃波形，该阶跃波形具有高达1 V的幅度幅度的多个量子电压阶跃。作为合成器的一种应用，我们建立了一个采样电压表，用于测量基于半导体的交流电源产生的正弦波形和约瑟夫森波形之间的差分电压。我们对振幅为1 V的50 Hz正弦波进行了广泛的采样测量，使用了55μs<= t_（a）<= 130μs范围内的采样孔径，并使用了32、60的Josephson波形，80和100量子步。通过测量，确定了交流波形的振幅，其A型不确定性（k均值2）为0.15μV。此外，我们阐明了交流波形中的相位抖动如何在测量的整体不确定性中得到反映。由于抖动引起的B类不确定度比A类不确定度小至少一个数量级。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号