Design of an ECG measuring system by the coupling capacitance amplifier between the human body
This paper proposes an electrocardiogram (ECG) measuring system which simultaneously enables the reduction of input impedance and low-frequency cutoff through virtual amplification of the coupling capacitance formed by body capacitance and ECG electrode. This virtual amplification of the coupling ca...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2017-09-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/83/853/83_17-00035/_pdf/-char/en |
| _version_ | 1811317721908903936 |
|---|---|
| author | Shingo TAKAHASHI Tetsuo NAKAMURA Yuto ARIMA Hideki HASHIMOTO Sousuke NAKAMURA |
| author_facet | Shingo TAKAHASHI Tetsuo NAKAMURA Yuto ARIMA Hideki HASHIMOTO Sousuke NAKAMURA |
| author_sort | Shingo TAKAHASHI |
| collection | DOAJ |
| description | This paper proposes an electrocardiogram (ECG) measuring system which simultaneously enables the reduction of input impedance and low-frequency cutoff through virtual amplification of the coupling capacitance formed by body capacitance and ECG electrode. This virtual amplification of the coupling capacitance is realized by the additional circuit which controls the inflow of external current to create the situation as if the time constant of the capacitance has increased. Moreover, not only this additional function but the amplification circuits commonly used in ECG measuring system has also been perfectly tuned-up. Here, instead of using the MOS-FET which shows bad noise characteristics, the combinations of J-FET differential amplifier and current feedback circuit have been used for stable amplification. In addition, coupling capacitors of the system are removed due to the DC-Coupling enabled by using single operational amplifiers instead of instrumentation operational amplifiers. |
| first_indexed | 2024-04-13T12:13:18Z |
| format | Article |
| id | doaj.art-e2445f22549d444bb1caf154f74b90d2 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T12:13:18Z |
| publishDate | 2017-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-e2445f22549d444bb1caf154f74b90d22022-12-22T02:47:26ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612017-09-018385317-0003517-0003510.1299/transjsme.17-00035transjsmeDesign of an ECG measuring system by the coupling capacitance amplifier between the human bodyShingo TAKAHASHI0Tetsuo NAKAMURA1Yuto ARIMA2Hideki HASHIMOTO3Sousuke NAKAMURA4Department of Electrical Electronic and Communication Engineering, Chuo UniversityDepartment of Information Science, Meisei UniversityFaculty of Engineering, Hosei UniversityDepartment of Electrical Electronic and Communication Engineering, Chuo UniversityFaculty of Engineering, Hosei UniversityThis paper proposes an electrocardiogram (ECG) measuring system which simultaneously enables the reduction of input impedance and low-frequency cutoff through virtual amplification of the coupling capacitance formed by body capacitance and ECG electrode. This virtual amplification of the coupling capacitance is realized by the additional circuit which controls the inflow of external current to create the situation as if the time constant of the capacitance has increased. Moreover, not only this additional function but the amplification circuits commonly used in ECG measuring system has also been perfectly tuned-up. Here, instead of using the MOS-FET which shows bad noise characteristics, the combinations of J-FET differential amplifier and current feedback circuit have been used for stable amplification. In addition, coupling capacitors of the system are removed due to the DC-Coupling enabled by using single operational amplifiers instead of instrumentation operational amplifiers.https://www.jstage.jst.go.jp/article/transjsme/83/853/83_17-00035/_pdf/-char/enecgcoupling capacitancetime constantinstrumentation operational amplifiers |
| spellingShingle | Shingo TAKAHASHI Tetsuo NAKAMURA Yuto ARIMA Hideki HASHIMOTO Sousuke NAKAMURA Design of an ECG measuring system by the coupling capacitance amplifier between the human body Nihon Kikai Gakkai ronbunshu ecg coupling capacitance time constant instrumentation operational amplifiers |
| title | Design of an ECG measuring system by the coupling capacitance amplifier between the human body |
| title_full | Design of an ECG measuring system by the coupling capacitance amplifier between the human body |
| title_fullStr | Design of an ECG measuring system by the coupling capacitance amplifier between the human body |
| title_full_unstemmed | Design of an ECG measuring system by the coupling capacitance amplifier between the human body |
| title_short | Design of an ECG measuring system by the coupling capacitance amplifier between the human body |
| title_sort | design of an ecg measuring system by the coupling capacitance amplifier between the human body |
| topic | ecg coupling capacitance time constant instrumentation operational amplifiers |
| url | https://www.jstage.jst.go.jp/article/transjsme/83/853/83_17-00035/_pdf/-char/en |
| work_keys_str_mv | AT shingotakahashi designofanecgmeasuringsystembythecouplingcapacitanceamplifierbetweenthehumanbody AT tetsuonakamura designofanecgmeasuringsystembythecouplingcapacitanceamplifierbetweenthehumanbody AT yutoarima designofanecgmeasuringsystembythecouplingcapacitanceamplifierbetweenthehumanbody AT hidekihashimoto designofanecgmeasuringsystembythecouplingcapacitanceamplifierbetweenthehumanbody AT sousukenakamura designofanecgmeasuringsystembythecouplingcapacitanceamplifierbetweenthehumanbody |