Iir filters are a kind of digital filters with recursive structure and are primarily used for high data throughput applications that can tolerance phase distortion and require a sharp cut - off characteristic 本文讨论的iir滤波器是一种递归结构的数字滤波器，主要用于能够容忍相位失真而要求具有良好的衰减特性的高数据处理量的系统中。
