Field-Programmable Gate Array-based fluxgate magnetometer with digital integration

作     者：Butta, Mattia Janosek, Michal Ripka, Pavel 

作者机构：Czech Tech Univ Dept Measurement Fac Elect Engn Prague 16627 Czech Republic 

出 版 物：《JOURNAL OF APPLIED PHYSICS》 (J Appl Phys)

年 卷 期：2010年第107卷第9期

页      面：09E714-1-09E714-3页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：FIELD programmable gate arrays FLUXGATE magnetometers MAGNETOMETERS GATE array circuits MAGNETIC devices 

摘      要：In this paper, a digital magnetometer based on printed circuit board fluxgate is presented. The fluxgate is pulse excited and the signal is extracted by gate integration. We investigate the possibility to perform integration on very narrow gates (typically 500 ns) by using digital techniques. The magnetometer is based on field-programmable gate array (FPGA) card: we will show all the advantages and disadvantages, given by digitalization of fluxgate output voltage by means of analog-to-digital converter on FPGA card, as well as digitalization performed by external digitizer. Due to very narrow gate, it is shown that a magnetometer entirely based on a FPGA card is preferable, because it avoids noise due to trigger instability. Both open loop and feedback operative mode are described and achieved results are presented. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3360773]