多级可配置CIC滤波器设计  

Design of multistage configurable CIC filter

作　　者：李升梅 赵海 倪屹[1] Li Shengmei;Zhao Hai;Ni Yi(College of IoT Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Jitri Intelligent Integrated Circuit Design Technology Research Institute Co.,Ltd.,Wuxi 214122,China)

机构地区：[1]江南大学物联网工程学院,江苏无锡214122 [2]江苏集萃智能集成电路设计技术研究所有限公司,江苏无锡214122

出　　处：《电子技术应用》2025年第2期46-51,共6页Application of Electronic Technique

摘　　要：针对超大规模集成电路的发展以及Sigma Delta模数转换器的广泛应用,提出一种面向24位Sigma Delta模数转换器的多级可配置级联积分梳状(Cascade Integral Comb,CIC)滤波器结构。滤波器结构借助级数调节和分时复用技术减少运算逻辑和存储逻辑单元,从而实现降低面积的目的。通过MATLAB Simulink搭建CIC滤波器模型进行仿真,并实现电路设计,仿真结果表明该滤波器可实现64~8192倍8种降采样可调和2级或3级级联可调。基于180nm COMS标准单元工艺库进行ASIC版图设计,与传统CIC滤波器比较,数字电路在面积上具有显著优势。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 64~8192 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.

关 键 词：CIC滤波器 降采样因子可调 级数可调 分时复用 

分 类 号：TN911[电子电信—通信与信息系统]