电子综合实践设计报告PAGEPAGE15电子综合实践设计报告中文题目简易心电图仪设计学号：姓名：指导老师：完成时间：摘要心电图是临床疾病诊断中常用的辅助手段。心电数据采集系统是心电图检查仪的关键部件。人体心电信号的主要频率范围为0.05Hz~100Hz，幅度约为0~4mV，信号十分微弱。由于心电信号中通常混杂有其它生物电信号，加之体外以50Hz工频干扰为主的电磁场的干扰，使得心电噪声背景较强，测量条件比较复杂。为了不失真地检出有临床价值的干净心电信号，往往要求心电数据采集系统具有高稳定性、高输入阻抗、高共模抑制比、低噪声及强抗干扰能力等性能。本设计利用集成仪表放大器AD620和滤波电路设计了一种符合上述要求的简易心电图仪。关键词：心电图干扰AD620滤波AbstractElectrocardiogramiscommonlyusedinclinicaldiseasediagnosisofauxiliarymeans.Ecgdataacquisitionsystemiselectrocardiogramcheckingofthekeycomponents.Themainbodyecgsignalfrequencyrangeis0.05Hz~100Hz,amplitudeisapproximately0~4mV,signalisveryweak.Becauseelectrocardiosignalusuallymingledwithotherbiologicalsignals,coupledwiththeinvitroin50Hzpowerfrequencyinterferenceofelectromagneticinterference,mainlymakingecgnoisebackgroundstronger,measuringconditionsarecomplex.Inordernottodistortiontodetectedwithclinicalvalueofecgsignal,cleanoftenaskecgdataacquisitionsystemwithhighstability,highinputimpedance,highcommonmoderejectionratio,lownoiseandstronganti-jammingability,suchasperformance.ThisdesignusingintegratedinstrumentationamplifierAD620andfiltercircuitdesignakindoftosatisfytheabove-mentionedrequirementsofsimpleecgapparatus.Keywords:electrocardiograminterferenceAD620filtering目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc281163187"摘要PAGEREF_Toc281163187\h2HYPERLINK\l"_Toc281163188"AbstractPAGEREF_Toc281163188\h3HYPERLINK\l"_Toc281163189"目录PAGEREF_Toc281163189\h4HYPERLINK\l"_Toc281163190"1、设计要求PAGEREF_Toc281163190\h5HYPERLINK\l"_Toc281163191"2、方案设计PAGEREF_Toc281163191\h6HYPERLINK\l"_Toc281163192"2.1理论分析及芯片选用依据PAGEREF_Toc281163192\h6HYPERLINK\l"_Toc281163193"2.2设计方案论证PAGEREF_Toc281163193\h6HYPERLINK\l"_Toc281163194"2.2.1输入回路噪声抑制设计PAGEREF_Toc281163194\h6HYPERLINK\l"_Toc281163195"2.2.2前置放大模块PAGEREF_Toc281163195\h7HYPERLINK\l"_Toc281163196"2.2.3滤波网络模块PAGEREF_Toc281163196\h7HYPERLINK\l"_Toc281163197"3、系统实现PAGEREF_Toc281163197\h8HYPER