核聚变与等离子体物理
覈聚變與等離子體物理
핵취변여등리자체물리
Nuclear Fusion and Plasma Physics
2015年
3期
265-271
,共7页
潘明俊%张明%李霆霆%郑玮%饶波%庄革
潘明俊%張明%李霆霆%鄭瑋%饒波%莊革
반명준%장명%리정정%정위%요파%장혁
隔离放大电路%J-TEXT装置%光耦合%线性度
隔離放大電路%J-TEXT裝置%光耦閤%線性度
격리방대전로%J-TEXT장치%광우합%선성도
Isolation amplifier%J-TEXT tokamak%Optical coupling%Linearity
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.
基于反饋技術設計瞭一款帶寬 2.7MHz、高線性度、低傳輸延時的光耦閤隔離放大器,倣真分析瞭I-V 轉換電路補償電容對電路頻率特性的影響,併選擇瞭閤適的電路參數.將部分寄生參數攷慮在內,建立瞭電路數學模型,倣真、測試與理論分析相結閤研究瞭電路的線性度與頻率特性.基于J-TEXT裝置靜電探針懸浮電位測量繫統驗證瞭電路在繫統中的可用性.
기우반궤기술설계료일관대관 2.7MHz、고선성도、저전수연시적광우합격리방대기,방진분석료I-V 전환전로보상전용대전로빈솔특성적영향,병선택료합괄적전로삼수.장부분기생삼수고필재내,건립료전로수학모형,방진、측시여이론분석상결합연구료전로적선성도여빈솔특성.기우J-TEXT장치정전탐침현부전위측량계통험증료전로재계통중적가용성.
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.
