基于雪崩三极管的高压方波脉冲发生器研究

Research on High-repetition High-voltage Nanosecond Rectangular Pulse Generator Based on Avalanche Transistor

测试与测量领域对快前沿脉冲发生器的需求越来越高,特别是要求产生高重复频率和高电压的快脉冲。本文使用串行雪崩三极管开发了一种低成本的便携式高重复频率高压纳秒方波脉冲发生器。通过优化设计串行晶体管电路和PCB,有效降低杂散电感和电压反射,使输出方波脉冲获得2.5ns的上升时间,幅度输出脉冲2.5kV,脉冲宽度为12.5ns。高压脉冲发生器在10kHz的高重复频率工作模式下,脉冲时间抖动小于100ps。

There’s more and more requirement for fast rise time pulse generator especially with high repetition frequency and high voltage.A cost effective and portable high-repetition high voltage nanosecond rectangular pulse generator is developed in this paper using serial avalanche transistors.By carefully designing the serial transistor circuit and PCB,the stray inductance and voltage reflection are reduced effectively,which make the output rectangular pulse obtain 2.5 ns rise time.The amplitude output pulse can reach up to 2.5 kV with 12.5 ns width.The pulse time jitter is less than 100 ps even in 10 kHz high repetition frequency output mode.