中文摘要：

提出由传输函数直接设计电流模式低通对数域滤波器的方法，实现了电流模式一阶低通对数域滤波器．并根据一阶低通、高通和全通滤波器之间的结构关系，设计出具有多输出功能的一阶对数域滤波器，该滤波器结构简单，PSPICE仿真表明，它具有良好的频率响应特性，可以实现低电压工作，且能通过改变外部电流调节截止频率．

英文摘要：

This paper proposes a design method of current-mode lowpass log-domain filter, which is derived from the transfer function. The first-order one is implemented. Based on the structure relative a- mong first-order lowpass, highpass, and allpass filter, we design the log-domain first-order multifunction filter. The proposed filter has a simple structure. PSPICE simulations show that it has good frequency response, and it can be operated at low voltage and electronically tuned by changing an external current.