中圖分類(lèi)號(hào)：TN911 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.245640 中文引用格式： 李升梅,，趙海，倪屹. 多級(jí)可配置CIC濾波器設(shè)計(jì)[J]. 電子技術(shù)應(yīng)用,，2025,，51(2)：46-51. 英文引用格式： Li Shengmei，Zhao Hai,，Ni Yi. Design of multistage configurable CIC filter[J]. Application of Electronic Technique,，2025，51(2)：46-51.
Design of multistage configurable CIC filter
Li Shengmei1,，Zhao Hai2,，Ni Yi1
1.College of IoT Engineering， Jiangnan University,； 2.Jiangsu Jitri Intelligent Integrated Circuit Design Technology Research Institute Co.,， Ltd.
Abstract： In view of the development of Very-Large-Scale Integration circuits and the wide application of Sigma Delta analogue-to-digital converters, this paper proposes a multi-stage configurable cascade integrated comb filter structure for 24-bit Sigma Delta analogue-to-digital converters.The structure reduces the number of operation logic and storage logic units with the help of adjusting the number of cascades and time division multiplexing techniques for reusing a circuit, thus achieving a reduction in area.The CIC filter model is constructed by MATLAB Simulink for simulation, and the code design is completel. The simulation results show that the filter can realise 64~8 192 times of 8 kinds of downsampling adjustable and 2-stage or 3-stage cascade adjustable. ASIC layout is designed based on 180 nm COMS standard cell process libraries, and digital circuits offer significant area advantages over traditional CIC filters.
