基于压力桥小信号放大链路研究

发布时间：2018-01-01 19:20

本文关键词：基于压力桥小信号放大链路研究　出处：《实验室研究与探索》2016年10期 　论文类型：期刊论文

【摘要】：微弱小信号采集在电子设计和数据采集中尤为重要,要有效处理小信号必须进行放大,但放大小信号的同时会将干扰放大并引起误差。为有效解决小信号放大中干扰和失调误差,文中在仔细研究小信号特性的基础上,提出采用精密仪表放大器和自归零技术对微弱信号放大,精密仪表放大器实现更高的共模抑制比,自归零技术减少失调误差,两者相结合可实现微弱信号稳定有效放大110倍。测试结果:在TINA-TI下进行仿真,可对毫伏级的信号稳定放大到几伏,并有效抑制干扰和失调误差。该设计具有一定的实用和参考价值,对研究小信号放大链路提供了一种新思路和设计方法。
[Abstract]:Weak small signal acquisition is particularly important in electronic design and data acquisition, to effectively process small signals must be amplified. In order to effectively solve the interference and misalignment error in small signal amplification, this paper studies the characteristics of small signal carefully. The precision instrument amplifier and self-return zero technology are used to amplify the weak signal. The precision instrument amplifier achieves higher common-mode rejection ratio, and the self-return zero technology reduces the misalignment error. The weak signal can be amplified 110-fold stably and effectively by the combination of the two methods. The test results show that the millivolt signal can be stably amplified to several volts by TINA-TI simulation. The design has some practical and reference value and provides a new idea and design method for the study of small signal amplification link.
【作者单位】：西京学院电子信息工程系;
【基金】：西京学院院科研基金项目资助(XJ120115)
【分类号】：TN722
【正文快照】： 0引言为了实现对非电量信号的检测,人们经常采用各种各样的传感器将其转换为微弱的电流或电压信号,如何对这些微弱的电信号进行采集处理?目前常用的方法是先进行信号放大,然后滤波,将滤波后的模拟电压值接入A/D采集电路将其转换为数字信号,然后输入给未处理器进行处理。在此数

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