采用如图所示的滤波器制作中心频率为500KHz的带通滤波器,Q=5,增益计算值为1.7,但是实际测出来的增益只有1.1左右.若改变参数使Q=10,增益为1,则实测增益只有0.5左右,请问出现这样的原因可能是怎样的?
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