| 应用于心电采集系统的低谐波失真全差分VGA测试验证 |
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| 引用本文： | 肖功利,覃玉良,徐卫林,韦保林,段吉海,韦雪明.应用于心电采集系统的低谐波失真全差分VGA测试验证[J].半导体学报,2015,36(10):105005-6. |
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| 作者姓名： | 肖功利 覃玉良 徐卫林 韦保林 段吉海 韦雪明 |
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| 基金项目： | 国家自然科学基金;省自然科学基金;其它 |
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| 摘 要： | 本文通过理论分析和流片测试验证了一个应用于心电采集系统的具有较低总谐波失真(THD)的全差分VGA。该VGA采用电容反馈技术来降低系统的非线性。本系统基于SMIC 0.18-μm CMOS工艺进行设计和流片,芯片面积仅为0.11 mm2。芯片测量结果同电路后仿真结果相吻合。测试结果表明VGA以3dB的增益步长由6.17dB到43.75dB变化,其高通角频率和低通角频率分别为0.22Hz和7.9kHz；各个增益级下获得最大的THD为-59.4dB。表明了该全差分VGA具有低的THD,其主要性能指标均满足心电采集系统在UWB健康监护与遥测系统中的应用要求。
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| 关 键 词： | fully differential VGA total harmonic distortion ECG acquisition system capacitive feedback |
| 收稿时间： | 2/3/2015 12:00:00 AM |
Demonstration of a fully differential VGA chip with small THD for ECG acquisition system |
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| Xiao Gongli,Qin Yuliang,Xu Weilin,Wei Baolin,Duan Jihai and Wei Xueming.Demonstration of a fully differential VGA chip with small THD for ECG acquisition system[J].Chinese Journal of Semiconductors,2015,36(10):105005-6. |
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| Authors: | Xiao Gongli Qin Yuliang Xu Weilin Wei Baolin Duan Jihai and Wei Xueming |
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| Affiliation: | 1. School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;Guangxi Experiment Center of Information Science, Guilin 541004, China;2. School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | |
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| Keywords: | fully differential VGA total harmonic distortion ECG acquisition system capacitive feedback |
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