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首先分析了一种由N对零极子和2N个导纳构成的基本电路。从分析结果中推导出实现N阶电流传递函数的条件。把零极子用电流传输器取代后，构成了N阶低通或高通电流型滤波电路。N阶电路使用N＋1个CCⅡ器件，所有RC元件接地，使电路得以稳定地工作。
First of all, we analyze a basic circuit consisting of N poles and 2N admittance. The conditions for achieving the Nth order current transfer function are deduced from the analysis results. The zero pole with a current transmitter replaced, constitute a N-order low-pass or high-pass current filter circuit. N order circuit uses N + 1 CC Ⅱ devices, all RC components are grounded, make the circuit can work stably.