IEPE加速度计电路噪声分析

发布时间：2017-12-30 20:42

本文关键词：IEPE加速度计电路噪声分析　出处：《振动.测试与诊断》2016年05期 　论文类型：期刊论文

【摘要】：研究压电集成电路加速度计的主要噪声源,利用En-In噪声模型将内部噪声源等效输入端,实现了输入噪声和输入信号的直接对比,能容易得到噪声对信号的影响。将Y-Δ变换原理引入T型网络噪声分析,降低噪声分析难度。通过对电路噪声的分析,在宽频范围内推导出可用于计算IEPE加速度计电路本底噪声的公式。将理论计算值与PSpice软件噪声分析所得值进行了对比,证明二者具有良好的相关性,同时得出了各噪声源在输入端对总噪声的贡献,提出了在不同频段内降低总噪声的方法,为IEPE加速度计电路的低噪声设计、参数选择和性能优化提供了理论依据。实验样机的实际值与理论值的对比结果表明,此法对于IEPE加速度计电路低噪声设计具有应用价值。
[Abstract]:The main noise source of integrated circuit piezoelectric accelerometer, the internal noise source equivalent input noise model using En-In, realized a direct comparison between the input noise and input signal, and can easily obtain the impact of noise on the signal. The Y- transform principle using T network noise analysis, noise analysis by analyzing the difficulty. The circuit noise in a wide frequency range is derived, which can be used to calculate the IEPE accelerometer circuit formula of background noise. The theoretical calculation results are compared with the PSpice software, the noise analysis of income, the two have proved a good correlation was obtained at the same time, the noise source at the input to the total noise contribution is proposed the method to reduce the noise in different frequency band, low noise design for IEPE accelerometer circuit, provides a theoretical basis for parameter selection and performance optimization. The actual value and the theoretical value of the experimental prototype The results show that this method is valuable for the low noise design of the IEPE accelerometer circuit.

【作者单位】：燕山大学电气工程学院;
【基金】：国家自然科学基金资助项目(61471312,61403333) 河北省青年科学基金资助项目(F2015203072)
【分类号】：TH824.4
【正文快照】： 引言压电集成电路(integral electronics piezoelectric,简称IEPE)加速度计是利用正压电效应来测量振动加速度的传感器。它将加速度信号有效地转化为电信号,具有宽动态范围、宽频率响应、宽工作温度范围、低输出阻抗、高灵敏度,且易于实现小型化等优点[1]。压电加速度计作为首

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