Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band
This study proposes using wireless low power thermal sensors for basal-body-temperature detection using frequency modulated telemetry devices. A long-term monitoring sensor requires low-power circuits including a sampling circuit and oscillator. Moreover, temperature compensated technologies are nec...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-11-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/15/11/29467 |
| _version_ | 1818013522098913280 |
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| author | Chin-Lung Yang Gou-Tsun Zheng |
| author_facet | Chin-Lung Yang Gou-Tsun Zheng |
| author_sort | Chin-Lung Yang |
| collection | DOAJ |
| description | This study proposes using wireless low power thermal sensors for basal-body-temperature detection using frequency modulated telemetry devices. A long-term monitoring sensor requires low-power circuits including a sampling circuit and oscillator. Moreover, temperature compensated technologies are necessary because the modulated frequency might have additional frequency deviations caused by the varying temperature. The temperature compensated oscillator is composed of a ring oscillator and a controlled-steering current source with temperature compensation, so the output frequency of the oscillator does not drift with temperature variations. The chip is fabricated in a standard Taiwan Semiconductor Manufacturing Company (TSMC) 0.18-μm complementary metal oxide semiconductor (CMOS) process, and the chip area is 0.9 mm2. The power consumption of the sampling amplifier is 128 µW. The power consumption of the voltage controlled oscillator (VCO) core is less than 40 µW, and the output is −3.04 dBm with a buffer stage. The output voltage of the bandgap reference circuit is 1 V. For temperature measurements, the maximum error is 0.18 °C with a standard deviation of ±0.061 °C, which is superior to the required specification of 0.1 °C. |
| first_indexed | 2024-04-14T06:34:16Z |
| format | Article |
| id | doaj.art-1858a99c7c284ca7ac43bad11717ec69 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T06:34:16Z |
| publishDate | 2015-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-1858a99c7c284ca7ac43bad11717ec692022-12-22T02:07:31ZengMDPI AGSensors1424-82202015-11-011511294672947710.3390/s151129467s151129467Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio BandChin-Lung Yang0Gou-Tsun Zheng1Department of Electrical Engineering, National Cheng-Kung University, Tainan 70101, TaiwanDepartment of Electrical Engineering, National Cheng-Kung University, Tainan 70101, TaiwanThis study proposes using wireless low power thermal sensors for basal-body-temperature detection using frequency modulated telemetry devices. A long-term monitoring sensor requires low-power circuits including a sampling circuit and oscillator. Moreover, temperature compensated technologies are necessary because the modulated frequency might have additional frequency deviations caused by the varying temperature. The temperature compensated oscillator is composed of a ring oscillator and a controlled-steering current source with temperature compensation, so the output frequency of the oscillator does not drift with temperature variations. The chip is fabricated in a standard Taiwan Semiconductor Manufacturing Company (TSMC) 0.18-μm complementary metal oxide semiconductor (CMOS) process, and the chip area is 0.9 mm2. The power consumption of the sampling amplifier is 128 µW. The power consumption of the voltage controlled oscillator (VCO) core is less than 40 µW, and the output is −3.04 dBm with a buffer stage. The output voltage of the bandgap reference circuit is 1 V. For temperature measurements, the maximum error is 0.18 °C with a standard deviation of ±0.061 °C, which is superior to the required specification of 0.1 °C.http://www.mdpi.com/1424-8220/15/11/29467implantable fractal dental antennabasal body temperaturetemperature compensated voltage-controlled oscillatorthermal sensor |
| spellingShingle | Chin-Lung Yang Gou-Tsun Zheng Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band Sensors implantable fractal dental antenna basal body temperature temperature compensated voltage-controlled oscillator thermal sensor |
| title | Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band |
| title_full | Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band |
| title_fullStr | Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band |
| title_full_unstemmed | Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band |
| title_short | Wireless Low-Power Integrated Basal-Body-Temperature Detection Systems Using Teeth Antennas in the MedRadio Band |
| title_sort | wireless low power integrated basal body temperature detection systems using teeth antennas in the medradio band |
| topic | implantable fractal dental antenna basal body temperature temperature compensated voltage-controlled oscillator thermal sensor |
| url | http://www.mdpi.com/1424-8220/15/11/29467 |
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