| 基于J-TEXT 装置的光耦合隔离放大器设计与分析 |
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| 引用本文： | 潘明俊,张 明,李霆霆,郑 玮,饶 波,庄 革.基于J-TEXT 装置的光耦合隔离放大器设计与分析[J].核聚变与等离子体物理,2015,35(3):265-271. |
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| 作者姓名： | 潘明俊 张 明 李霆霆 郑 玮 饶 波 庄 革 |
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| 作者单位： | (1. 强电磁工程与新技术国家重点实验室，武汉 430074； 2. 华中科技大学电气与电子工程学院，武汉 430074) |
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| 基金项目： | 国家磁约束核聚变能发展研究专项项目课题(2010GB108001；2013GB113003) |
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| 摘 要： | 基于反馈技术设计了一款带宽2.7MHz、高线性度、低传输延时的光耦合隔离放大器，仿真分析了 I-V 转换电路补偿电容对电路频率特性的影响，并选择了合适的电路参数。将部分寄生参数考虑在内，建立了电路数学模型，仿真、测试与理论分析相结合研究了电路的线性度与频率特性。基于J-TEXT 装置静电探针悬浮电位测量系统验证了电路在系统中的可用性。
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| 关 键 词： | 隔离放大电路 J-TEXT 装置 光耦合 线性度 |
Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak |
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| PAN Ming-jun,ZHANG Ming,LI Ting-ting,ZHENG Wei,RAO Bo,ZHUANG Ge.Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak[J].Nuclear Fusion and Plasma Physics,2015,35(3):265-271. |
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| Authors: | PAN Ming-jun ZHANG Ming LI Ting-ting ZHENG Wei RAO Bo ZHUANG Ge |
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| Institution: | (1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan 430074; 2. Huazhong University of Science and Technology, Wuhan 430074) |
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| Abstract: | A wideband optical coupling isolation amplifier is presented. Experimental results showed that the presented isolation amplifier can transmit an analog signal from dc to 2.7MHz with good linearity and low propagation delay. Effects of the compensation capacitor on the frequency characteristics of the isolation amplifier was studied by simulation analysis. Meanwhile the mathematical model of the circuit was established with parts of the parasitic parameters taken into consideration. The linearity and frequency characteristics of the circuit was studied, combining theoretical analysis, simulation and test. At last, the availability of the presented isolation amplifier was verified in the Langmuir probe floating potential measurement system on J-TEXT tokamak. |
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| Keywords: | Isolation amplifier J-TEXT tokamak Optical coupling Linearity |
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