论文标题
静态驱动螺线管中的低频磁噪声，用于偏置磁场传感器
Low-Frequency Magnetic Noise in Statically-Driven Solenoid for Biasing Magnetic Field Sensors
论文作者
论文摘要
对于生成静电场的生成，螺线管经常用于研究和开发磁场传感器。当要根据其固有噪声分析这种传感器时，需要最大程度地降低测量系统其他噪声源的影响。本文报告了这种线圈系统中的低频磁噪声。一方面，研究了线圈本身的固有噪声的影响，另一方面研究了各种市售电流源的其他电流噪声的影响，因此，这也会导致线圈内的磁噪声。在几十$ \ mathrm {ft}/\ sqrt {\ mathrm {hz}} $的范围内，低频值的范围内，线圈的固有噪声大多是可以忽略的。但是，经常利用电流来源来生成静态磁性偏置场，通常在$ \ mathrm {nt}/\ sqrt {\ mathrm {hz}} $方案中导致显着的低频磁通噪声。发现无法通过增加线圈的磁灵敏度，即磁通密度作为静电电流的函数来降低这种噪声。取而代之的是，需要具有非常高的电流噪声比率的当前来源。
For the generation of static magnetic fields solenoids are frequently used for the purpose of research and development of magnetic field sensors. When such a sensor is to be analyzed with regard to its inherent noise the influence of other noise sources of the measurement system needs to be minimized. This article reports on the low-frequency magnetic noise within such a coil system. On the one hand, the impact of the intrinsic noise of the coil itself and on the other hand the impact of additional current noise of various commercially available current sources, which accordingly also leads to magnetic noise within the coil, are investigated. With low-frequency values in the range of a few tens of $\mathrm{fT}/\sqrt{\mathrm{Hz}}$, the coil's inherent noise is mostly neglectable. However, frequently utilized current sources for the generation of a static magnetic bias field lead to significant low-frequency magnetic flux noise typically in the $\mathrm{nT}/\sqrt{\mathrm{Hz}}$ regime. It is found that this noise cannot be decreased by increasing the coil's magnetic sensitivity, i.e. the magnetic flux density as a function of the static current. Instead, current sources with very high current-to-current-noise ratios are required.
