Self-adaptive loop for external disturbance reduction in differential measurement set-up
Abstract
We present a method developed to actively compensate common-mode magnetic disturbances on a multi-sensor 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 using 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.
Cite
@article{arxiv.1803.03212,
title = {Self-adaptive loop for external disturbance reduction in differential measurement set-up},
author = {Giuseppe Bevilacqua and Valerio Biancalana and Yordanka Dancheva and Antonio Vigilante},
journal= {arXiv preprint arXiv:1803.03212},
year = {2019}
}
Comments
7 pages, 8 figures, 26 refs