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High-speed, high-voltage pulse generation using avalanche transistor.

Gou Yong-Sheng1, Liu Bai-Yu1, Bai Yong-Lin1

  • 1Ultra-fast Diagnostic Labs, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China.

The Review of Scientific Instruments
|June 3, 2016
PubMed
Summary
This summary is machine-generated.

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This study demonstrates a high-speed, high-voltage pulse (HHP) generating circuit using avalanche transistors. Optimized PCB design and transistor selection achieved a 2 kV pulse with a 200 ps rise time.

Area of Science:

  • Electrical Engineering
  • Solid-State Physics

Background:

  • Avalanche transistors are key components for high-speed pulse generation.
  • Understanding their conduction mechanism is crucial for optimizing circuit performance.

Purpose of the Study:

  • To demonstrate the conduction mechanism of avalanche transistors.
  • To design and analyze a high-speed, high-voltage pulse (HHP) generating circuit.
  • To improve the output pulse's rise time.

Main Methods:

  • Illustrated operating conditions for high-speed pulse generation.
  • Designed an HHP generating circuit based on avalanche transistor analysis.
  • Proposed methods for reducing output pulse rise time, including transistor selection and PCB parasitic reduction.
  • Designed and manufactured a PCB with a tapered transmission line.

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Main Results:

  • Successfully designed and tested an HHP generating circuit.
  • Achieved an output pulse amplitude of 2 kV.
  • Realized a pulse rise time of approximately 200 ps using FMMT417 avalanche transistors on the custom PCB.

Conclusions:

  • The designed HHP generating circuit is effective for producing fast, high-voltage pulses.
  • Optimized PCB design and avalanche transistor selection are critical for achieving sub-nanosecond rise times.