Self-Adaptive Loop for External-Disturbance Reduction in a Differential Measurement Setup

被引：19

作者：

Bevilacqua, Giuseppe ^{[1
]}

Biancalana, Valerio ^{[1
]}

Dancheva, Yordanka ^{[2
]}

Vigilante, Antonio ^{[2
]}

机构：

[1] Univ Siena, DIISM, Via Roma 56, I-53100 Siena, Italy

[2] Univ Siena, DSFTA, Via Roma 56, I-53100 Siena, Italy

来源：

PHYSICAL REVIEW APPLIED | 2019年 / 11卷 / 01期

关键词：

D O I：

10.1103/PhysRevApplied.11.014029

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a method developed to actively compensate common-mode magnetic disturbances on a multisensor device devoted to differential measurements. The system uses a field-programmable-gated-array card, and operates in conjunction with a high-sensitivity magnetometer: compensating the common mode of magnetic disturbances results in a relevant reduction of the difference-mode noise. The digital nature of the compensation system allows for the use of a numerical approach aimed at automatically adapting the feedback-loop filter response. A common-mode-disturbance attenuation exceeding 50 dB is achieved, resulting in a final improvement of the differential noise floor by a factor of 10 over the whole spectral interval of interest.

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页数：8

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