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《Journal of Tianjin University》 2007-12
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Multistage Realization of Decimation Filter in ∑-Δ ADC

MA Shao-yu,HAN Yan,CAI You (Institute of Microelectronics and Optoelectronics,Zhejiang University,Hangzhou 310027,China)  
A multistage decimation filter for audio oversampling∑-Δ A/D converter was designed and implemented in SMIC 0.18 μm CMOS process.The filter consists of a cascaded-integrator-comb(CIC) filter,a compensation filter and two FIR half-band filters.The compensation filter offsets the droop of the CIC filter,the pass-band ripple of the decimation filter was less than 0.006 dB after compensation.A twice decimation was also achieved by the compensation filter,which resulted in hardware saving of a half-band filter.Canonic signed digit(CSD) number system with shifters and adders was used instead of large multipliers.By processing the bit stream from a 3-level ∑-Δ modulator with an oversampling ratio of 256,a signal-to-noise ratio of 107 dB was obtained for the filter,which was sufficient for the high-end audio applications.
【CateGory Index】: TN713.7
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【References】
Chinese Journal Full-text Database 2 Hits
1 FU Juan,WANG Chi,LI Xing-fei(State Key Laborotary of Precision Measurement Technology & Instruments,Tianjin University,Tianjin 300072,China);Design of decimation filter of ∑-Δ microgravity accelerometers[J];Transducer and Microsystem Technologies;2009-07
2 HE Feng,LI Gang,LIN Ling(Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments,Tianjin University,Tianjin 300072,China);Realization of an All-Purpose Bioelectricity Detecting System Based on Oversampling Technique[J];Journal of Tianjin University;2008-10
【Citations】
Chinese Journal Full-text Database 1 Hits
1 LI Hua, LI Dong-mei, LI Fu-le, WANG Zhi-hua(Dept. Electronic Engineering, Tsinghua University, Beijing 100084, P. R. China);Implementation of a Decimation Filter for Oversampling Σ-Δ A/D Converters[J];Microelectronics;2004-06
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 CAO Jian,ZHANG Bo,YANG Chang-sheng,ZHAO Yan(School of Physics Science and Technology,Central South University,Changsha Hunan 410083,China);CIC decimation filter based algorithm of harmonic analysis[J];Journal of Computer Applications;2009-07
2 WANG Dejiang,KUANG Haipeng,CAI Xichang(Changchun Institute of Optics,Fine Mechanics and Physics,The Chinese Academy of Sciences,Changchun 130033,P.R.China);Design of an 8-Channel Audio Sampling Rate Converter and Its ASIC Implementation[J];Microelectronics;2009-01
【Co-references】
Chinese Journal Full-text Database 5 Hits
1 LI Gang,ZHANG Li-jun,LIN Ling,HE Feng(Biomedical Signal Detecting and Processing Laboratory in Tianjin University,Tianjin 300072,China);Weak Signal Detection Based on Over-Sampling and Saw-Tooth Shaped Function[J];Acta Electronica Sinica;2008-04
2 LI Guo(College of Computer Science & Technology,Civil Aviation University of China,Tianjin 300300);Study and Implementation of Improving ADC Resolution Based on Over Sampling Technology[J];Computer Engineering;2005-S1
3 ZHANG Yuan-yuan,JIANG Yan-feng(Microelectronics Center,College of Information Engineering, North China University of Technology,Beijing 100041,P.R.China);An Overview of Sigma-Delta Analog-to-Digital Converter[J];Microelectronics;2006-04
4 LI Jia-hui,ZHOU Jin-zhi (Department of Information, South -west University of Science And Technology , Mianyang Sichuan 621010,China);Implementing Structure of Decimation Filter[J];Information and Electronic Engineering;2006-04
5 Wang Ping Li Xiaojing (Tianjin Polytechnic University, Tianjin 300160,China);Improving ADC Resolution and Signal-noise Ratio by Oversampling[J];Chinese Journal of Scientific Instrument;2002-S1
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