基于雪崩管的脉冲源相对于基于气体开关和半导体断路(SOS)开关的脉冲源,输出脉冲幅度较低。为了进一步提高雪崩管脉冲源的输出幅度,进行功率合成是行之有效的方法,其关键在于脉冲源单元具有高稳定度和时基一致性。分析了触发脉冲对基于雪崩管的脉冲源的影响机理,指出脉冲抖动的影响因素：触发脉冲上升斜率、雪崩管器件导通电平方差、电路噪声。在实验中,通过提高触发脉冲幅度,增加上升斜率,脉冲源抖动和单元之间的时基一致性均优于20 ps。

As for pulse generators based on gas-switch and SOS-switch, the output of the avalanche transistor pulse is relatively low. To increase its output, the method of power-combining is used. The key point is that the pulse-generator-units must have high stability and time-coherence. The reason why the trigger pulse affects the pulse-generator based on avalanche transistor is analyzed in the paper. And the key influence factors, which are the slope of the trigger pulse, the difference of avalanche transistors and the noise of circuits, are found out. In experiment, the jitter of the pulse-generator and the time-coherence between units are less than 20 ps through increasing the extent and slope of the trigger pulse.