| A Novel Dual-Rate Sampling Switched-Capacitor Configuration and Its Application |
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| 引用本文： | CAO Kunyong YU Shenglin(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics Nanjing 210016 China). A Novel Dual-Rate Sampling Switched-Capacitor Configuration and Its Application[J]. 中国电子科技, 2003, 1(1) |
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| 作者姓名： | CAO Kunyong YU Shenglin(College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China) |
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| 作者单位： | College of Automation Engineering，Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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| 基金项目： | Supported by the National Nature Science Foundation(No. 60072004)and the University Postgraduate Station Foundation of China(No.2000061402) |
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| 摘 要： | In order to realize accurate bilinear transformation from s- to z-domain,a novelswitched-capacitor configuration is proposed in the light of principles of dual-rate sampling and chargeconservation,which has also been used for building a 5th-order elliptic lowpass filter.The filter issimulated and measured in typical 0.34 μm/3.3 V Si CMOS process models,special full differentialoperational amplifiers and CMOS transfer gate switches,which achieves 80 MHz sampling rate,17.8MHz cutoff frequency,0.052 dB maximum passband ripple,42.1 dB minimum stopband attenuation and74 mW quiescent power dissipation.At the same time,the dual-rate sampling topology breaks thetraditional restrictions of filter introduced by unit-gain bandwidth and slew rate of operational amplifiersand also improves effectively their performances in high-frequency applications.It has been applied forthe design of an anti-alias filter in analog front-end of video decoder IC with 15 MHz signal frequencyyet.
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| 关 键 词： | a novel SC configuration dual-rate sampling 80MSPS 0.34μm Si CMOS switched capacitor filter(SCF) |
A Novel Dual-Rate Sampling Switched-Capacitor Configuration and Its Application |
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| YU Qi,YANG Mohua,CHENG Yu,WANG Xiangzhan,LIU Changxiao,LAN Jialong. A Novel Dual-Rate Sampling Switched-Capacitor Configuration and Its Application[J]. Journal of Electronic Science Technology of China, 2003, 1(1) |
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| Authors: | YU Qi YANG Mohua CHENG Yu WANG Xiangzhan LIU Changxiao LAN Jialong |
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| Abstract: | In order to realize accurate bilinear transformation from s- to z-domain, a novel switched- capacitor configuration is proposed in the light of principles of dual-rate sampling and charge conservation, which has also been used for building a 5th-order elliptic lowpass filter. The filter is simulated and measured in typical 0.34 μm/3.3 V Si CMOS process models, special full differential operational amplifiers and CMOS transfer gate switches, which achieves 80 MHz sampling rate, 17.8MHz cutoff frequency, 0.052 dB maximum passband ripple, 42.1 dB minimum stopband attenuation and 74 mW quiescent power dissipation. At the same time, the dual-rate sampling topology breaks the traditional restrictions of filter introduced by unit-gain bandwidth and slew rate of operational amplifiers and also improves effectively their performances in high-frequency applications. It has been applied for the design of an anti-alias filter in analog front-end of video decoder IC with 15 MHz signal frequency yet. |
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| Keywords: | a novel SC configuration dual-rate sampling 80MSPS switched capacitor filter(SCF) |
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