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推荐一种用于二∑-△A/D换器的非常有效的多级十进制滤波器的设计与实现方法,由两级组成,但是,推荐的方法能方便地扩展到多级实现。第一级滤波器通过在Z平面适当地变换梳状滤波器的零极配置而获得。设计相位方便灵活,当大部分量化噪声在第一级被消除时,第二级滤波器能用不严格的规范设计,任意经典的算法可为它使用。分解一级成两个子级可获得第二级的选择方案,文中推荐的方法能反复迭代。该方法可用于声扫雷具控制和水雷信号的处理。 系统性能已通过模拟评估。
A very efficient multi-stage decimation filter design and implementation method for two sigma-delta A / D converters is proposed. It consists of two stages. However, the proposed method can be easily extended to multi-stage implementation. The first-stage filter is obtained by appropriately changing the zero-pole configuration of the comb filter in the Z-plane. The design phase is convenient and flexible. When most of the quantization noise is eliminated at the first stage, the second stage filter can be designed with less stringent specifications and any classical algorithm can be used for it. Decomposition of a child into two sub-level can be a second-level options, the article recommended methods iterative. The method can be used to control the sounding mine and mine signal processing. System performance has been evaluated by simulation.