用THS3091,放大了脉宽是1ns的脉冲,脉冲的脉宽展宽,是不是THS3091的压摆率不够。
1ns脉宽的脉冲,是不是压摆率=2×pi×f×Vpk要大于10000V/us,
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可以计算下,THS3091 SR按datasheet 5000V/us来计算,SR=2*pi*f*Vp,当Vp=5V时,可算出f=159.2MHZ,所以频率在2MHZ是可以正常放大的。