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本文提出两个低系数敏感度和低舍入误差的二阶递归数字滤波器的新结构。该结构是通过两步两对抽出法获得的。第一步改善系数的敏感度,第二步降低数字滤波器传递函数的阶次。文中还仔细地分析了新结构的系数敏感度和舍入误差。
This paper proposes two new structures for second-order recursive digital filters with low coefficient sensitivity and low rounding error. The structure is obtained by a two-step two-pair extraction method. The first step is to improve the sensitivity of the coefficients and the second step is to lower the order of the transfer function of the digital filter. The article also carefully analyzed the new structure of the coefficient sensitivity and rounding error.