一种低功耗心电信号采集模拟前端电路  

A Low Power Analog Front-End Circuit for ECG Signal Acquisition

作　　者：邹晓磊 张瑛 苏曼卿[1,2] ZOU Xiaolei;ZHANG Ying;SU Manqing(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing Univ.of Posts and Telecommunications,Nanjing210046,P.R.China;National and Local Joint Engineering Lab.of RF Integration and Micro-Assembly Technology,Nanjing Univ.of Posts and Telecommunications,Nanjing210046,P.R.China)

机构地区：[1]南京邮电大学电子与光学工程学院、微电子学院,南京210046 [2]南京邮电大学射频集成与微组装技术国家地方联合工程实验室,南京210046

出　　处：《微电子学》2020年第1期11-15,共5页Microelectronics

基　　金：国家自然科学基金资助项目(61106021);中国博士后科学基金资助项目(2015M582541).

摘　　要：设计了一种采用通道复用技术的低功耗心电信号采集电路。该电路由多通路数据选择电路、前置放大器、缓冲器和G_m-C低通滤波器组成。多通路数据选择电路中的开关采用栅压自举型开关结构,提高了线性度。该采集电路基于0.18μm CMOS工艺进行设计与仿真。仿真结果表明,静态电流仅为5μA,增益为46 dB,带宽为39 mHz^19 kHz,开关的切换频率为10 kHz。该采集电路能实现多导联心电信号的采集。A low power analog front-end(AFE)circuit for ECG signal acquisition was presented by adopting channel multiplexing technology.The designed AFE circuit consisted of a multi-path data selection circuit,a preamplifier,a buffer and a G_m-C low-pass filter.The switch in the multi-path data selection circuit adopted a gate-voltage bootstrap type switch structure to improve the linearity.The circuit was designed and simulated in a 0.18μm CMOS process.The simulation results showed that the circuit only consumed 5μA quiescent current and gave a 46 dB gain in the band from 39 mHz to 19 kHz with the switching frequency of the switch was 10 kHz.It could realize the acquisition of multi-lead ECG signals.

关 键 词：心电信号采集 多通路数据选择电路 前置放大器 

分 类 号：TN432[电子电信—微电子学与固体电子学]