在半球共振器陀螺仪中读出电路的比较噪声分析
Zhihao Yu1,2, Libin Zeng1, Changda Xing1
1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
Micromachines
|July 30, 2025
概括
对于高精度半球共振陀螺仪 (HRG) 系统,电荷敏感放大器 (CSA) 与传 impedance 放大器 (TIA) 相比,显著降低了读出电路噪声. 这导致了更好的共振器位移检测和适合要求高的应用.
科学领域:
- 仪器仪表和测量仪器的使用
- 电子工程 电子工程
- 物理 物理学 物理
背景情况:
- 读出电路噪声是半球共振陀螺仪 (HRG) 控制系统中限制精度的关键因素.
- 了解传 impedance 放大器 (TIA) 和电荷敏感放大器 (CSA) 等放大器中的噪声源对于改进共振器位移检测至关重要.
研究的目的:
- 为了比较TIA和CSA在HRG读出电路中的噪声特征和贡献机制.
- 识别占主导地位的噪声源,并评估它们对检测精度的影响.
- 为选择和设计HRG读出电路提供指导.
主要方法:
- 为TIA和CSA开发一个全面的噪音模型.
- 分析电路带宽和反网络效应.
- 模拟和实验验证理论噪声模型.
主要成果:
- 反电阻的热噪声主导着TIA噪声 (99.8%).
- 与TIA (25.8 μVrms) 相比,CSA的输出噪声显著降低 (13.2 μVrms),减少了48.8%.
- CSA实现了优越的等效位移噪声 (1.69×10-14m/Hz) 与TIA (1.27×10-13m/Hz) 相比,改善了86.7%.
结论:
- 该CSA的电容反网络有效地抑制高频噪声,使其更适合高精度HRG应用.
- 该研究通过实验数据验证了理论噪声模型.
- 结果为HRG读出电路设计提供了宝贵的理论和技术参考.
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