其降阶指把电流环时间常数调整到尽量小，低频信号段可等效为普通比例环节。
The intension of reduce rank is that the time constant of current-ring is regulated to the best of minimum, and low frequency signal is equated to common proportional component.
最后本文详细介绍了高阶电流模式滤波器的系统方法，阐述了等效电路替代法和多环反馈法，给出了设计的具体步骤。
In the last section, as the design methods of high-order current-mode integrated filters, the equivalent circuits and the multi-loop feedbacks are systematically expounded.
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