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使用标准公式进行滤波器设计,常需冗长的计算.用诺模图来设计定K型和m导滤波器,很容易而且快.制定诺模图时,假定滤波器的输入和输出阻抗相等,频率从1赫到500兆赫,终端阻抗从3.5欧到30兆欧;对m导而言,m值从0.2到0.9.在图表中也考虑到了复合滤波器的计算.本图表仅适用于不平衡的滤波器,但从不平衡变换到平衡可应用一般变换规则.
Filter design using standard formulas often requires lengthy calculations. It is easy and fast to design a K-mode and m-channel filter with a nomogram, and when formulating a nomogram, it is assumed that the input and output impedances of the filter are equal, The frequency is from 1 Hz to 500 MHz and the termination impedance is from 3.5 to 30 megohms; for m, the value of m is from 0.2 to 0.9 The calculation of the composite filter is also taken into account in the graph This chart applies only to unbalance Of the filter, but from unbalanced to balanced can apply the general transformation rules.