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为了实现一种适用于放大电流源转换器信号的测量放大器,提出了一种高性能的跨阻式测量放大器,它由3个运算浮地电流传输器和4个电阻器构成.采用OFCC实现设计的TIA和OFCC的电路结构,分析了OFCC的非理想特性对提出的跨阻式测量放大器性能的影响.通过SPICE对提出的设计方案的仿真结果表明,提出的跨阻式测量放大器设计不但能够提供一个稳定的电压输出和较小的输出噪声电平,以及具有高增益、高共模抑制比和与频率无关的差分增益,而且在更宽的带宽上能够有独立于TIA有限开环增益的共模抑制比,相比于现有的基于运算跨阻放大器的设计,还减少了元件数量.
Abstract：In order to amplify the signal of current source converter,this paper presents a high-performance transimpedance measurement amplifier,which consists of three operational floating current conveyors and four resistors.The circuit structures of TIA and OFCC are designed,and the influence of the non ideal characteristics of OFCC on the performance of the proposed transimpedance measurement amplifier is analyzed.SPICE simulation results show that the design can not only provide a stable voltage output and low output noise level,but also has high gain,high common mode rejection ratio and frequency independent differential gain.Moreover,it can have a common mode rejection ratio independent of TIA finite open-loop gain in a wider bandwidth.Compared with the existing design based on operational transimpedance amplifier,the number of components is reduced.
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基本信息:
DOI：10.16393/j.cnki.37-1436/z.2021.02.007
中图分类号:TN722
引用信息:
[1]马玉清,李如平,吴房胜.一种高性能跨阻式测量放大器的设计[J].菏泽学院学报,2021,43(02):25-29.DOI:10.16393/j.cnki.37-1436/z.2021.02.007.
基金信息:
安徽省质量工程教学研究项目（2019jyxm0746）; 安徽省职业与成人教育学会教育科研规划重点课题（azjxh17023）; 安徽省大学生创客实验室计划（2016ckjh031）; 安徽省教学师范课-数字电子技术（皖教秘高[2020]165号）
2021-04-15
2021-04-15