Σ-ΔA/DC频谱补偿的研究  

Study on the frequency domain compensation of Σ-ΔA/DC

作　　者：王小林[1] 林凌[1] 李刚[1] 王朔[1] 刘铭[1] 

机构地区：[1]天津大学精密仪器与光电子学院,天津300072

出　　处：《现代仪器》2004年第6期35-37,共3页Modern Instruments

摘　　要：Σ -ΔA/DC的数字滤波通常使用SINC3滤波器 ,该滤波器通带内带宽很窄 ,对于较高频率的信号衰减过大 ,严重限制Σ -ΔA/DC的应用。本文研究两种频谱补偿的方法 ,以改善Σ -ΔA/DC带宽 。?ΔA/DC has a wide application for its high S/N ratios, low requirements for anti-aliasing filter,embedded integration function and other advantages.SINC 3 filters are very often used for Σ-ΔA/DC digital filtering, and the high frequency of the signal will be over attenuated because of its rather narrow bandwidth. This has seriously influnced the use of Σ-ΔA/DC .This paper studies two frequency domain methods to widen the bandwidth of Σ-ΔA/DC ,and an example of Electrocardiogram (ECG) is given to illustrate the compensating result of the methods.

关 键 词：∑-△A/DC 频谱补偿 FFT FIR滤波器 

分 类 号：TH133.33[机械工程—机械制造及自动化] TN792[电子电信—电路与系统]