模拟跨阻低通滤波器的设计

摘要

The input signal of trans-impedance filter is current, while its output signal is voltage. In this paper, a designmethod of trans-impedance filter is presented. Also, the topologies and calculation methods of parameters of three kinds ofbiquadratic filter's trans-impedance low-pass circuits are introduced in detail, according to the low, medium and high qualityfactor (Q). Then the high-order can be designed by low-order tans-impedance low-pass filter joined with traditional filters.Finally, to verify the effectiveness of the design, a design example of high-order tans-impedance low-pass would be carriedout.%跨阻滤波器的输入为电流信号,输出为电压信号.本文给出了跨阻滤波器的设计方法,并按照品质因数Q的低、中、高详细介绍了三种双二阶节跨阻低通滤波器的电路拓扑结构及其参数计算方法.二阶跨阻低通滤波器与传统滤波器相级联即可实现高阶跨阻低通滤波器.最后,通过高阶跨阻低通滤波器的设计实例,验证文中所给出的设计方法的有效性.