首页> 外文会议>International Symposium on Communications and Information Technologies(ISCIT 2005) vol.1; 20051012-14; Beijgin(CN) >Efficient Technique for Improving the Frequency Response of CIC Decimation Filter
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Efficient Technique for Improving the Frequency Response of CIC Decimation Filter

机译:改善CIC抽取滤波器频率响应的有效技术

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摘要

CIC (cascaded-integrator-comb) filter is widely used as the decimation filter in oversampled sigma-delta analog-to-digital converter (ADC) due to its simplicity which requires no multiplication or coefficient storage. However, the frequency response of the CIC filter has a high passband droop and low stopband attenuation. In this paper we present two-stage structure based on CIC and cosine filters which is multiplier-free. Besides the proposed filter does not have any filtering at the high input rate and exhibits the high attenuation at the frequency point of interest.
机译:CIC(级联积分梳状)滤波器由于其简单性(无需乘法或系数存储)而被广泛用作过采样sigma-delta模数转换器(ADC)中的抽取滤波器。但是,CIC滤波器的频率响应具有较高的通带下降和较低的阻带衰减。在本文中,我们提出了一种基于CIC和余弦滤波器的无乘子的两阶段结构。此外,所提出的滤波器在高输入速率下没有任何滤波,并且在感兴趣的频率点处表现出高衰减。

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