无源积分器的参数测量

卫兵; 张元军; 康军军; 郭帆; 徐乐

doi:10.11884/HPLPB202537.240267

无源积分器的参数测量

doi: 10.11884/HPLPB202537.240267

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

基金项目: 国家自然科学基金项目(12475157)

详细信息

作者简介:
卫　兵，73wb@163.com

中图分类号: TM835.4
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- 文章访问数: 88
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- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-18
- 修回日期: 2025-02-10
- 录用日期: 2025-02-10
- 网络出版日期: 2025-03-07
- 刊出日期: 2025-03-15

Parameter measurement of passive integrator

Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, Mianyang 621999, China

摘要

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1 MΩ负载条件下积分器的频率特性。仿真计算表明，积分器连接1 MΩ负载时，低频拐点远远低于连接50 Ω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。
- 无源积分器 /
- 脉冲高电压 /
- 测量 /
- 频率响应 /
- 标定
Abstract: To obtain the actual bandwidth and RC time constant of the passive integrator, the frequency characteristics of the integrator under 1 MΩ load 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 MΩ load is much lower than that of integrator with 50 Ω load, 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.
- passive integrator /
- high voltage pulse /
- measurement /
- frequency response /
- calibration

HTML全文

图 1 无源积分器的简化电路

Figure 1. Simplified circuit of passive integrator

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图 2 负载阻抗对无源积分器频率特性的影响

Figure 2. Influence of load impedance on frequency characteristics of passive integrator

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图 3 积分器频响特性测量示意图

Figure 3. Diagram of frequency response characteristic measurement of integrator

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图 4 系列参数积分器的S₂₁参数测量结果

Figure 4. Measurement results of S₂₁ parameters of series parameter passive integrator

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图 5 纵轴转换后系列积分器的频响特性

Figure 5. Frequency response characteristics of series integrator after y-axis is transformed

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图 6 测量的积分器低频特性与理想积分器仿真结果比较

Figure 6. Comparison of low frequency characteristics of measured integrator and simulation results of ideal integrator

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图 7 使用有源探头与直接测试的频响特性比较

Figure 7. Comparison of frequency response characteristics with and without active probe

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图 8 纵轴转换后的频响特性比较

Figure 8. Comparison of frequency response characteristics of integrator after y-axis is transformed

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表 1 积分器的频率特性数据

Table 1. Frequency characteristics data of passive integrator

RC/μs f_L/kHz f_H/MHz

1 159 1200

2 80 1100

4 40 800

10 16 500

20 8.0 500

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