光纤陀螺前置放大滤波电路的噪声分析

光纤陀螺的全数字闭环处理技术是解决光纤陀螺输出非线性问题的关键，其中光电转换及前置放大部分是保证闭环处理有序准确进行的前提和保障。光电转换及前置放大部分的噪声主要来自光电探测器的散粒噪声和前置放大器的噪声。因此，本文对全数字闭环处理过程中前放滤波部分的噪声进行了分析，针对现用的放大器芯片提出了对比优化方案并进行了试验验证,结果表明通过对比选择低噪声前置放大器会减小对陀螺零偏稳定性的影响，对光纤陀螺的工程应用有良好的参考价值。

Preamplifier Circuit Noise Analysis for Fiber-optic Gyroscope

All-digital closed-loop processing technology of fiber-optic gyroscope is the key to solve nonlinear problems of FOG output. Photoelectric conversion and pre-amplifier are the premise and safeguard to perform closed-loop processing. The noise from the conversion and preamplifier is the main part of the total conversion and amplification. Therefore, this paper analyses the main noise of this part, puts forward the optimization program and makes a test. The result shows that the preamplifier with low noise will reduce the zero bias of FOG, which holds a reference on the engineering applications.