| 基于Switched-RC技术的0.8V带通滤波器 |
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| 引用本文： | 章建钦,李开航.基于Switched-RC技术的0.8V带通滤波器[J].现代电子技术,2008,31(9):177-179. |
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| 作者姓名： | 章建钦 李开航 |
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| 作者单位： | 厦门大学,福建,厦门,361005 |
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| 摘 要： | 开关电容滤波器是信号处理系统的重要组成模块,设计了一种用于心率检测设备的六阶带通开关电容滤波器。该设计基于开关电阻电容技术,利用开关电阻代替传统的采样开关,实现了更高的采样线性度,是低压下开关电容滤波器正常工作的一种全新实现方案。仿真结果表明,该滤波器在0.8 V工作电压下,功耗为0.9 mW,输出摆幅可达1.2Vp-p,通带增益为10 dB,-3 dB带宽为25~80 Hz。
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| 关 键 词： | 开关电阻电容 开关电容 滤波器 低压 |
| 文章编号： | 1004-373X(2008)09-177-03 |
| 修稿时间： | 2007年10月30 |
0.8 V Bandpass Filter Based on Switched-RC Technique |
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| ZHANG Jianqin,LI Kaihang.0.8 V Bandpass Filter Based on Switched-RC Technique[J].Modern Electronic Technique,2008,31(9):177-179. |
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| Authors: | ZHANG Jianqin LI Kaihang |
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| Abstract: | A six-order bandpass switched-capacitor filter for a heart rate sensing equipment has been designed.The filter is based on the switched-RC technology which is a new approach to realize the propel operation of SC filter under low supply voltage.The simulation results show that:at 0.8 V supply voltage,it consumes about 0.9 mW,the output swing is 1.2 Vp-p,and the inband gain is 10 dB,-3 dB bandwidth is 25~80 Hz. |
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| Keywords: | switched-RC switched-capacitor filter low-voltage |
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