| 一种MHz光耦隔离放大器的设计与分析 |
| |
| 引用本文： | 李霆霆,张明,潘明俊.一种MHz光耦隔离放大器的设计与分析[J].电子学报,2014,42(7):1398-1402. |
| |
| 作者姓名： | 李霆霆 张明 潘明俊 |
| |
| 作者单位： | 1. 华中科技大学强电磁工程与新技术国家重点实验室, 湖北武汉 430074;
2. 华中科技大学电气与电子工程学院, 湖北武汉 430074;
3. 国网株洲供电公司, 湖南株洲 412000 |
| |
| 基金项目： | 国际热核聚变实验堆(ITER)计划专项“聚变装置特种电源技术及其系统研究”(No ．2010GB108001)；国家磁约束核聚变能发展研究专项“等离子体破裂瞬态电磁和热载荷实验研究” |
| |
| 摘 要： | 本文设计了一种基于高线性度高带宽模拟光耦HCNR201芯片的MHz光耦隔离放大器电路，主要应用于计算机数据采集系统中，对其信号进行隔离从而实现过电压保护和提高共模抑制比.HCNR201光耦器件具有双光电二极管结构，使电路在输入端构成反馈环节，消除了光耦的电流传输比对直流增益的影响，为了方便分析建立了它的等效电路.利用线性控制系统的理论方法建立了所设计的隔离放大器电路的数学模型，推导出了电路的传递函数，对电路进行了理论分析和参数优化，并给出了分析设计结果.同时研制了隔离电路并对其进行了实验测试，实验结果与理论分析结果比较一致，符合设计要求，其理论分析方法可以为类似电路设计提供参考.
|
| 关 键 词： | 光耦 隔离放大器 数学模型 |
| 收稿时间： | 2013-04-22 |
Design and Analysis of an Optocoupler Isolation Amplifier with MHz Bandwidth |
| |
| LI Ting-ting,ZHANG Ming,PAN Ming-jun.Design and Analysis of an Optocoupler Isolation Amplifier with MHz Bandwidth[J].Acta Electronica Sinica,2014,42(7):1398-1402. |
| |
| Authors: | LI Ting-ting ZHANG Ming PAN Ming-jun |
| |
| Affiliation: | 1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan, Hubei 430074, China;
2. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China;
3. State Grid Zhuzhou Electric Power Company, Zhuzhou, Hunan 412000, China |
| |
| Abstract: | An optocoupler isolation amplifier with MHz bandwidth is designed based on HCNR201.It is mainly used in computer data acquisition system,and isolates the signal to realize over-voltage protection and improve the common mode rejection ratio.The HCNR201 consists of double photodiodes which can form a feedback loop in the input port to eliminate the impact of current transfer ratio of the optocoupler on the DC gain.This paper presented the equivalent circuit of HCNR201 for facilitate analysis.This paper built mathematical model of the circuit,derived the transfer function,and gave theoretically analysis and optimized the parameters.We presented the analysis and design results,and the experiment test of the circuit consistent with theoretical analysis is given.The optocoupler isolation amplifier meets the requirements and the theoretical analysis method can provide reference for similar circuit design. |
| |
| Keywords: | isolation amplifier optocoupler mathematical model |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《电子学报》浏览原始摘要信息 |
|
点击此处可从《电子学报》下载全文 |
|
