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设计一个四阶椭圆低通滤波器，通频带为50KHZ，仿真可以但是实际实际焊接时出现自激振荡问题。我照书本的解决办法，在中间级并联一个大的电容，单还是没法解决，这个电路如何解决？？？？
OPA690四阶椭圆低通滤波.TSC
