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A rectangular pulse Marx generator with an adjustable dead time drive circuit.

Jie Deng1, Yuyu Zhu1, Lu Zhang2

  • 1School of Information and Control Engineering, Southwest University of Science and Technology, Mianyang 621010, China.

The Review of Scientific Instruments
|July 1, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel Marx generator with adjustable dead time (DT) for precise high-voltage pulse generation. The design improves voltage balancing and reduces short-circuit risks, enabling reliable rectangular pulse output.

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Area of Science:

  • Electrical Engineering
  • Pulsed Power Systems
  • High-Voltage Engineering

Background:

  • Marx generators are crucial for high-voltage pulse applications.
  • Existing designs often struggle with precise control over pulse parameters and voltage balancing.
  • Parasitic capacitances and switching transients can degrade pulse quality and reliability.

Purpose of the Study:

  • To develop a rectangular pulse Marx generator with continuously adjustable dead time (DT).
  • To enhance voltage balancing across series-connected switches.
  • To improve the reliability and reduce the probability of short-circuit formation in Marx generators.

Main Methods:

  • A load-side discharge path was introduced for controlled charge removal.
  • An RC-delay-based magnetic drive circuit was developed for adjustable DT (0-200 ns).
  • A resistor-capacitor-diode (RCD) voltage-balancing circuit was implemented for series-connected MOSFETs.

Main Results:

  • The maximum voltage deviation was reduced from over 66% to approximately 10%.
  • An eight-stage prototype generated ~5 kV from a 650 V input.
  • Fall time was maintained while rise time slightly increased with the RCD circuit; pulse width is adjustable (2-10 μs) and stable 10 kHz operation was achieved.

Conclusions:

  • The proposed Marx generator effectively produces high-voltage rectangular pulses with adjustable DT and improved voltage balancing.
  • The integrated RCD circuit enhances voltage distribution accuracy.
  • The design offers a reliable solution for applications requiring precise high-voltage pulse generation.