An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier
Pulse oximeters are ubiquitous in modern medicine to noninvasively measure the percentage of oxygenated hemoglobin in a patient's blood by comparing the transmission characteristics of red and infrared light-emitting diode light through the patient's finger with a photoreceptor. We present...
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| Format: | Article |
| Language: | en_US |
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Institute of Electrical and Electronics Engineers
2011
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| Online Access: | http://hdl.handle.net/1721.1/62185 https://orcid.org/0000-0003-0384-3786 |
| _version_ | 1811082519067492352 |
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| author | Tavakoli, Maziar Turicchia, Lorenzo Sarpeshkar, Rahul |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Tavakoli, Maziar Turicchia, Lorenzo Sarpeshkar, Rahul |
| author_sort | Tavakoli, Maziar |
| collection | MIT |
| description | Pulse oximeters are ubiquitous in modern medicine to noninvasively measure the percentage of oxygenated hemoglobin in a patient's blood by comparing the transmission characteristics of red and infrared light-emitting diode light through the patient's finger with a photoreceptor. We present an analog single-chip pulse oximeter with 4.8-mW total power dissipation, which is an order of magnitude below our measurements on commercial implementations. The majority of this power reduction is due to the use of a novel logarithmic transimpedance amplifier with inherent contrast sensitivity, distributed amplification, unilateralization, and automatic loop gain control. The transimpedance amplifier, together with a photodiode current source, form a high-performance photoreceptor with characteristics similar to those found in nature, which allows LED power to be reduced. Therefore, our oximeter is well suited for portable medical applications, such as continuous home-care monitoring for elderly or chronic patients, emergency patient transport, remote soldier monitoring, and wireless medical sensing. Furthermore, our design obviates the need for an A-to-D and digital signal processor and leads to a small single-chip solution. We outline how extensions of our work could lead to submilliwatt oximeters. |
| first_indexed | 2024-09-23T12:04:42Z |
| format | Article |
| id | mit-1721.1/62185 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:04:42Z |
| publishDate | 2011 |
| publisher | Institute of Electrical and Electronics Engineers |
| record_format | dspace |
| spelling | mit-1721.1/621852022-09-27T23:57:10Z An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier Tavakoli, Maziar Turicchia, Lorenzo Sarpeshkar, Rahul Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Sarpeshkar, Rahul Tavakoli, Maziar Turicchia, Lorenzo Sarpeshkar, Rahul United States. Office of Naval Research (Contract No. N00014-02-1- 0434) Pulse oximeters are ubiquitous in modern medicine to noninvasively measure the percentage of oxygenated hemoglobin in a patient's blood by comparing the transmission characteristics of red and infrared light-emitting diode light through the patient's finger with a photoreceptor. We present an analog single-chip pulse oximeter with 4.8-mW total power dissipation, which is an order of magnitude below our measurements on commercial implementations. The majority of this power reduction is due to the use of a novel logarithmic transimpedance amplifier with inherent contrast sensitivity, distributed amplification, unilateralization, and automatic loop gain control. The transimpedance amplifier, together with a photodiode current source, form a high-performance photoreceptor with characteristics similar to those found in nature, which allows LED power to be reduced. Therefore, our oximeter is well suited for portable medical applications, such as continuous home-care monitoring for elderly or chronic patients, emergency patient transport, remote soldier monitoring, and wireless medical sensing. Furthermore, our design obviates the need for an A-to-D and digital signal processor and leads to a small single-chip solution. We outline how extensions of our work could lead to submilliwatt oximeters. 2011-04-08T21:18:03Z 2011-04-08T21:18:03Z 2009-12 2009-06 Article http://purl.org/eprint/type/JournalArticle 1932-4545 INSPEC Accession Number: 11102451 http://hdl.handle.net/1721.1/62185 Tavakoli, M., L. Turicchia, and R. Sarpeshkar. “An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier.” Biomedical Circuits and Systems, IEEE Transactions On 4.1 (2010) : 27-38. Copyright © 2010, IEEE https://orcid.org/0000-0003-0384-3786 en_US http://dx.doi.org/10.1109/tbcas.2009.2033035 IEEE transactions on biomedical circuits and systems Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Electrical and Electronics Engineers IEEE |
| spellingShingle | United States. Office of Naval Research (Contract No. N00014-02-1- 0434) Tavakoli, Maziar Turicchia, Lorenzo Sarpeshkar, Rahul An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title | An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title_full | An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title_fullStr | An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title_full_unstemmed | An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title_short | An Ultra-Low-Power Pulse Oximeter Implemented With an Energy-Efficient Transimpedance Amplifier |
| title_sort | ultra low power pulse oximeter implemented with an energy efficient transimpedance amplifier |
| topic | United States. Office of Naval Research (Contract No. N00014-02-1- 0434) |
| url | http://hdl.handle.net/1721.1/62185 https://orcid.org/0000-0003-0384-3786 |
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