一种运算放大器低频噪声测量方法

doi:10.3969/j.issn.0255-8297.2019.03.007

应用科学学报 ›› 2019, Vol. 37 ›› Issue (3): 369-377.doi: 10.3969/j.issn.0255-8297.2019.03.007

一种运算放大器低频噪声测量方法

陈晓娟¹, 张新超¹, 姜山², 康爱民²

1. 长春理工大学电子信息工程学院, 长春 130022;
2. 国网吉林供电公司, 长春 130022

收稿日期:2018-07-02 修回日期:2018-11-26 出版日期:2019-05-31 发布日期:2019-05-31
作者简介:陈晓娟,教授,博导,研究方向:智能微弱信号处理,E-mail:cxj.neiep@126.com
基金资助:
吉林省教育厅"十三五"科学技术研究项目基金（No.201696）资助

A Method of Low Frequency Noise Measurement for Operational Amplifier

CHEN Xiaojuan¹, ZHANG Xinchao¹, JANG Shan², KANG Aimin²

1. College of Electronical and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China;
2. Jilin Electric Power Corporation, Changchun 130022, China

Received:2018-07-02 Revised:2018-11-26 Online:2019-05-31 Published:2019-05-31

摘要/Abstract

摘要： 提出一种由分立元件搭建的新型集成运放低频噪声测量系统.首先建立了运算放大器的噪声模型；然后对测试系统的各个模块电路进行设计和仿真；最后通过数据采集卡及频谱分析仪对被测集成运放的低频噪声数据进行频域分析.实验结果表明，该方法能够实现集成运放低频噪声10⁰~10⁵ Hz频域内功率谱密度数据的测量和采集，此数据与厂家提供的数据手册中的典型输入等效噪声值基本吻合，测量相对误差为0.039.

关键词: 长期不稳定性, 时间序列, 低频噪声, 功率谱密度, 背景噪声

Abstract: This paper presents a new type of integrated operational amplifier low-frequency noise measurement system built by discrete components. First, the noise model of the operational amplifier is established. Then sub-circuit modules of the test system are designed and simulated separately. Finally, the low-frequency noise measurement and data acquisition of the integrated operational amplifier are performed. The experimental results show that this system can realize the measurement of low frequency noise and power spectral density of integrated operational amplifiers in the frequency range of 10⁰~10⁵ kHz. The measured input equivalent noise value is basically consistent with that presented in the product data-sheet, with the measurement error is 0.039.

Key words: background noise, long-term instabity, low frequency noise, time series, power spectral density

中图分类号:

TN306

陈晓娟, 张新超, 姜山, 康爱民. 一种运算放大器低频噪声测量方法[J]. 应用科学学报, 2019, 37(3): 369-377.

CHEN Xiaojuan, ZHANG Xinchao, JANG Shan, KANG Aimin. A Method of Low Frequency Noise Measurement for Operational Amplifier[J]. Journal of Applied Sciences, 2019, 37(3): 369-377.

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一种运算放大器低频噪声测量方法

A Method of Low Frequency Noise Measurement for Operational Amplifier

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