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麻烦看下这个sallen key 滤波器为什么会自激。感谢!

Other Parts Discussed in Thread: TINA-TI

底下是我所列的传递函数。不知道最后一个是否正确?

图上的滤波器,只要去掉C2与C5就可以消除自激?请问为什么