Stochastic multi-channel lock-in detection

Stochastic multi-channel lock-in detection
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随机多通道锁定检测

DOI:
10.1088/1367-2630/16/1/013005
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发表时间:
2014
影响因子:
3.3
通讯作者:
Hudson J
Hudson J
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hudson J

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高精度测量得益于小信号的锁定检测。在这里,我们讨论的扩展锁定检测到许多渠道,使用相互正交的调制波形,并显示波形的选择如何影响信号的信息内容。我们还考虑如何以及检测方案拒绝噪声,随机和相关的。我们解决的特殊困难,拒绝背景漂移,使输出信号中的可再现的偏移,我们展示了如何通过改变运行之间的波形,并在许多运行的平均值,可以避免系统误差。这些进展使得最近对电子电偶极矩的测量成为可能(哈德逊et al 2011 Nature 473 493)。
High-precision measurements benefit from lock-in detection of small signals. Here we discuss the extension of lock-in detection to many channels, using mutually orthogonal modulation waveforms, and show how the choice of waveforms affects the information content of the signal. We also consider how well the detection scheme rejects noise, both random and correlated. We address the particular difficulty of rejecting a background drift that makes a reproducible offset in the output signal and we show how a systematic error can be avoided by changing the waveforms between runs and averaging over many runs. These advances made possible a recent measurement of the electron's electric dipole moment (Hudson et al 2011 Nature 473 493).
DOI: --
发表时间: 1971
期刊:
影响因子: --
作者:
G. Harrison;M. Player;P. Sandars
通讯作者: P. Sandars
改进的同步检测器。
DOI: --
发表时间: 1949
影响因子: 1.6
作者:
W. C. Michels;E. D. Redding
通讯作者: E. D. Redding