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给出了一种电流模式基本二阶节有源滤波器的冗余元件设计方法，通过加入冗余的零泛器，可以从电压模式基本二阶节有源滤波器电路导出与其相对应的电流模式二阶节有源滤波器电路，设计出的电路采用第二代负单位增益电流传输器（ＣＣＩ－）来实现．此电路与原电压模式电路相比具有相同的符号传输函数，且电路中的无源元件与原电压模式电路中的无源元件数值相同．最后，文中给出一个设计实例来说明设计过程．
A method for designing the redundant element of the current-mode basic second-order active filter is given. By adding redundant zero-pans, the corresponding current can be derived from the voltage mode basic second-order active filter circuit Mode second-order active filter circuit, the design of the circuit using second-generation negative unity gain current transmitter (CCI-) to achieve. This circuit has the same sign transfer function as the original voltage mode circuit, and the passive components in the circuit have the same values as the passive components in the original voltage mode circuit. Finally, a design example is given to illustrate the design process.