Cargando…
A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements
A low-power stable wideband current source for acupuncture point skin impedance measurements has been designed employing a differential architecture and negative feedback. The circuits extend bandwidth to 1 MHz, reducing harmonic distortion to 0.24% at 1 MHz. The output impedance is 37 MΩ at 100 kHz...
| Autores principales: | , , , , , |
|---|---|
| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Hindawi
2021
|
| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7806389/ https://www.ncbi.nlm.nih.gov/pubmed/33505642 http://dx.doi.org/10.1155/2021/6650651 |
| _version_ | 1783636513243791360 |
|---|---|
| author | Qiu, Changpei Zhao, Tianxia Li, Qiuping Wang, Xin'an Xiao, Kanglin Wang, Bo |
| author_facet | Qiu, Changpei Zhao, Tianxia Li, Qiuping Wang, Xin'an Xiao, Kanglin Wang, Bo |
| author_sort | Qiu, Changpei |
| collection | PubMed |
| description | A low-power stable wideband current source for acupuncture point skin impedance measurements has been designed employing a differential architecture and negative feedback. The circuits extend bandwidth to 1 MHz, reducing harmonic distortion to 0.24% at 1 MHz. The output impedance is 37 MΩ at 100 kHz and 11 MΩ at 1 MHz. The stability of the output current of the current source when connected to different loads is below 0.1% at frequencies up to 500 kHz and increases to 0.74% at 1 MHz. The circuit was manufactured in a 0.13-μm CMOS technology and measured results are presented. The area of the current source is 0.09 mm(2) and its consumption is 1.2 mW. It is intended for low-power acupuncture point skin impedance measurements. |
| format | Online Article Text |
| id | pubmed-7806389 |
| institution | National Center for Biotechnology Information |
| language | English |
| publishDate | 2021 |
| publisher | Hindawi |
| record_format | MEDLINE/PubMed |
| spelling | pubmed-78063892021-01-26 A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements Qiu, Changpei Zhao, Tianxia Li, Qiuping Wang, Xin'an Xiao, Kanglin Wang, Bo J Healthc Eng Research Article A low-power stable wideband current source for acupuncture point skin impedance measurements has been designed employing a differential architecture and negative feedback. The circuits extend bandwidth to 1 MHz, reducing harmonic distortion to 0.24% at 1 MHz. The output impedance is 37 MΩ at 100 kHz and 11 MΩ at 1 MHz. The stability of the output current of the current source when connected to different loads is below 0.1% at frequencies up to 500 kHz and increases to 0.74% at 1 MHz. The circuit was manufactured in a 0.13-μm CMOS technology and measured results are presented. The area of the current source is 0.09 mm(2) and its consumption is 1.2 mW. It is intended for low-power acupuncture point skin impedance measurements. Hindawi 2021-01-06 /pmc/articles/PMC7806389/ /pubmed/33505642 http://dx.doi.org/10.1155/2021/6650651 Text en Copyright © 2021 Changpei Qiu et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| spellingShingle | Research Article Qiu, Changpei Zhao, Tianxia Li, Qiuping Wang, Xin'an Xiao, Kanglin Wang, Bo A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title | A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title_full | A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title_fullStr | A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title_full_unstemmed | A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title_short | A Low-Power Stable Wideband Current Source for Acupuncture Point Skin Impedance Measurements |
| title_sort | low-power stable wideband current source for acupuncture point skin impedance measurements |
| topic | Research Article |
| url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7806389/ https://www.ncbi.nlm.nih.gov/pubmed/33505642 http://dx.doi.org/10.1155/2021/6650651 |
| work_keys_str_mv | AT qiuchangpei alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT zhaotianxia alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT liqiuping alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT wangxinan alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT xiaokanglin alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT wangbo alowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT qiuchangpei lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT zhaotianxia lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT liqiuping lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT wangxinan lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT xiaokanglin lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements AT wangbo lowpowerstablewidebandcurrentsourceforacupuncturepointskinimpedancemeasurements |