Capacitive divider for measuring μs width square wave pulse

Wei Bing; Li Yong; Kang Junjun; Guo fan; Zhou Liangji

doi:10.11884/HPLPB202335.220150

Volume 35 Issue 2

Jan. 2023

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Wei Bing, Li Yong, Kang Junjun, et al. Capacitive divider for measuring μs width square wave pulse[J]. High Power Laser and Particle Beams, 2023, 35: 025002. doi: 10.11884/HPLPB202335.220150

Citation:

Wei Bing, Li Yong, Kang Junjun, et al. Capacitive divider for measuring μs width square wave pulse[J]. High Power Laser and Particle Beams, 2023, 35: 025002. doi: 10.11884/HPLPB202335.220150

Wei Bing, Li Yong, Kang Junjun, et al. Capacitive divider for measuring μs width square wave pulse[J]. High Power Laser and Particle Beams, 2023, 35: 025002. doi: 10.11884/HPLPB202335.220150

Citation:

Wei Bing, Li Yong, Kang Junjun, et al. Capacitive divider for measuring μs width square wave pulse[J]. High Power Laser and Particle Beams, 2023, 35: 025002. doi: 10.11884/HPLPB202335.220150

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Capacitive divider for measuring μs width square wave pulse

doi: 10.11884/HPLPB202335.220150

Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, P.O. Box 919-108, Mianyang 621999, China

Received Date: 2022-05-11
Accepted Date: 2022-09-21
Rev Recd Date: 2022-09-13

Available Online: 2022-09-22

Publish Date: 2023-01-14

Abstract

Abstract

The output waveform of capacitive voltage divider has top tilt when measuring square-wave signal with pulse width of several microsecond. To solve this problem, an improved two-end matched capacitive divider is designed. The capacitive divider with two-end matching modes is simulated in frequency domain and time domain. The simulation results show that the linearity of the amplitude-frequency characteristic of the capacitive divider is not good in the middle frequency band. And the output waveform of the divider has overshoot when it responds to square wave signals. The calculation method of the beginning resistance and the corresponding terminal series capacitance has been improved, and the two-end matched capacitive divider has been improved. The experimental results show that when the low-voltage arm capacitance of divider is 2 nF and the electric length of the signal cable is 50 ns, the output waveform of the improved two-end matched capacitive divider has no top tilt , and the overshoot is less than 2%.
- voltage pulse,
- capacitive divider,
- two-end match,
- frequency respond

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References(15)

References

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