基于雪崩晶体管产生快沿脉冲的电路参数分析

Analysis on the Circuit Parameters of the Fast Rising Pulse Source Based on Avalanche Transistor

利用雪崩晶体管组成Marx电路可以产生快沿双指数脉冲,为了找出电路参数对脉冲波形的影响。建立了放电回路等效电路,利用Pspice软件对电路参数影响脉冲波形问题进行了仿真分析,利用设计的三级Marx电路进行了试验验证。通过理论计算、仿真以及试验研究表明充电电压、充电电容、负载电阻主要影响脉冲峰值和脉宽,在一定限度内,充电电压、充电电容越大,峰值电压越高,脉宽越宽,负载电阻变大,脉宽变宽。这为脉冲源设计中元器件的选取以及脉冲波形调节措施研究提供了依据。

The fast rising pulse source with double exponential waveform can be produced in Marx circuits based on avalanche transistors. To find the influence between the circuit parameters and pulse, built equivalent circuit about the dis- charge loop, simulated the problem by the Pspice program, experiment verified the resuh by a pulser with three-stage Marx cir- cuit. The result was that the charge voltage, the capacity, and the load resistance mainly influenced the peak value and the pulse-width of the pulse. The peak value and pulse-width would be lager when the charge voltage and the capacity were big- ger. The load resistance affect pulse-width also, and pulse-width would be lager when load resistance is bigger.