Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak

doi:10.16568/j.0254-6086.201503013

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2015, Vol. 35 ›› Issue (3): 265-271.DOI: 10.16568/j.0254-6086.201503013

• Nuclear Fusion Engineering and Technology • Previous Articles Next Articles

Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak

PAN Ming-jun1, 2, ZHANG Ming1, 2, LI Ting-ting1, 2, ZHENG Wei1, 2, RAO Bo1, 2, ZHUANG Ge1, 2

(1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan 430074; 2. Huazhong University of Science and Technology, Wuhan 430074)

Online:2015-09-15 Published:2015-09-15

基于J-TEXT 装置的光耦合隔离放大器设计与分析

潘明俊1, 2，张明1, 2，李霆霆1, 2 ，郑玮1, 2，饶波1, 2，庄革1, 2

(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)

作者简介:潘明俊(1989-)，男，湖北武汉人，硕士研究生，电气工程专业。
基金资助:
国家磁约束核聚变能发展研究专项项目课题(2010GB108001；2013GB113003)

Abstract

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.

Key words: Isolation amplifier, J-TEXT tokamak, Optical coupling, Linearity

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。

关键词: 隔离放大电路, J-TEXT 装置, 光耦合, 线性度

CLC Number:

TL65+6

PAN Ming-jun1, 2, ZHANG Ming1, 2, LI Ting-ting1, 2, ZHENG Wei1, 2, RAO Bo1, 2, ZHUANG Ge1, 2. Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2015, 35(3): 265-271.

潘明俊1, 2，张明1, 2，李霆霆1, 2 ，郑玮1, 2，饶波1, 2，庄革1, 2. 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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Design and analysis of optical coupling isolation amplifier for J-TEXT tokamak

基于J-TEXT 装置的光耦合隔离放大器设计与分析

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