【摘要】 传统的CIC(Cascaded integrator comb)抽取器设计往往不能同时满足改善频响特性、降低采样率和降低功耗的要求,需采取折中的办法。本文提出了一种改进的CIC抽取器结构,用多项分解的方法降低了抽取滤波器工作的采样率,同时降低了功耗;再用曲线拟合技术改进频响特性,这种抽取器在降低采样率、减少硬件资源和改善频响特性3个方面同时得到满足,数值仿真验证了这一结论。更多还原

【Abstract】 The conventional CIC decimator cannot satisfy the requirements on the magtitude response,the power consumption and sample rate at the same time.This paper proposes a modified CIC decimator architecture.It can decrease the sample rate and the power by polyphase decomposition method;and modify frequency response characteristics by using curve regression technology.The three requiements can be satisfied by the improved decimator.The numerical simulation proves the results.更多还原