Magnetoresistive magnetometer with improved bandwidth and response characteristics

Magnetoresistive magnetometer with improved bandwidth and response characteristics
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具有改进的带宽和响应特性的磁阻磁力计

DOI：
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发表时间：
2005
期刊：
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通讯作者：
S. Varas
S. Varas
中科院分区：
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文献类型：
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作者：
A. Bertoldi;D. Bassi;L. Ricci;D. Covi;S. Varas

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本文报道了一种基于磁阻传感器、工作在±600μT范围内的高性能、紧凑型磁强计的实现和特性。输出由数值和场比例电压两种方式提供。通过以100kHz的频率翻转薄膜磁化来抑制假偏移效应，比传统应用高2∕3个数量级。该设计允许20nT的现场分辨率，低输出噪声密度，高精度和准确度（相对满量程不确定度约为500ppm）。
We report on the realization and characterization of a high performance, compact magnetometer based on a magnetoresistive sensor and working in the range ±600μT. The output is provided both numerically and by means of a field-proportional voltage. Spurious offset effects are suppressed by flipping the film magnetization at a frequency of 100kHz, 2∕3 orders of magnitude higher than in conventional applications. The design allows for a field resolution of 20nT, low output noise density, and high precision and accuracy (relative full-scale uncertainty of about 500ppm).