无源积分器的参数测量  

Parameter measurement of passive integrator

作　　者：卫兵[1] 张元军[1] 康军军[1] 郭帆[1] 徐乐[1] Wei Bing;Zhang Yuanjun;Kang Junjun;Guo Fan;Xu Le(Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,Mianyang 621999,China)

机构地区：[1]中国工程物理研究院流体物理研究所脉冲功率科学与技术重点实验室,四川绵阳621999

出　　处：《强激光与粒子束》2025年第3期134-138,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(12475157)。

摘　　要：为获取无源积分器实际的带宽以及RC时间常数,使用有源高阻探头配合网络分析仪测量了1MΩ负载条件下积分器的频率特性。仿真计算表明,积分器连接1MΩ负载时,低频拐点远远低于连接50Ω的结果,测量结果与仿真结果一致。实测结果表明,积分器频率特性的高频段背离了与频率成反比的线性衰减的理论趋势,这个结果与实际电路的杂散参数有关。通过转换纵坐标判断积分器的频率上限,结合计算的低频结果,可以得到积分器的工作带宽。应用积分器的幅频特性公式结合扫频测量结果计算RC常数,该方法较为简便且不确定度较小。To obtain the actual bandwidth and RC time constant of the passive integrator,the frequency characteristics of the integrator under 1 MΩload are measured by using an active high impedance probe and a network analyzer.The simulation results show that the low frequency inflection point of integrator with 1 MΩload is much lower than that of integrator with 50Ωload,and the measured results are consistent with the simulation results.The measured results show that the high frequency band of the integrator frequency characteristic deviates from the theoretical trend of linear attenuation inversely proportional to the frequency,which is related to the spurious parameters of the actual circuit.The upper frequency limit of the integrator is determined by transforming the ordinate,and the working bandwidth of the integrator can be obtained by combining the calculated low frequency results.The RC constant is calculated by using the amplitude-frequency characteristic formula of integrator combined with the frequency sweep measurement results,which is simple and has less uncertainty.

关 键 词：无源积分器 脉冲高电压 测量 频率响应 标定 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]