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用运放OPA2846做脉冲小信号放大电路，信号会有一个过冲，调试将C2焊一个470pf的电容，过冲会消失，但信号的脉宽会变大，也不是预期的要求了，过冲是怎么产生的啊
这是一个带通滤波电路, 真好在通频带上的信号最小的衰减.
