中圖分類號：TN911 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.245640
中文引用格式： 李升梅，趙海，倪屹. 多級可配置CIC濾波器設(shè)計[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

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.

Key words : CIC filter；downsampling factor adjustable；stages adjustable；time division multiplexing circuit