Efficient capacitance sensing for wireless health monitoring system.
This paper presents a low power capacitance to voltage converter (CVC) circuit using two differential amplifier circuits, two Schottky rectifier diodes constructed in symmetrical manner and combined with instrumentation amplifier circuits. The differential capacitance to voltage simulation work has...
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| Format: | Article |
| Language: | English English |
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IIUM Journal Publication
2016
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| Online Access: | http://irep.iium.edu.my/53419/ http://irep.iium.edu.my/53419/1/609-3201-1-PB.pdf http://irep.iium.edu.my/53419/7/53419_Efficient%20capacitance%20sensing%20for%20wireless%20health%20monitoring%20system_WoS.pdf |
| _version_ | 1848784228325523456 |
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| author | Che Mustapha, Nurul Arfah Alam, A. H. M. Zahirul Khan, Sheroz Azman, Amelia Wong |
| author_facet | Che Mustapha, Nurul Arfah Alam, A. H. M. Zahirul Khan, Sheroz Azman, Amelia Wong |
| author_sort | Che Mustapha, Nurul Arfah |
| building | IIUM Repository |
| collection | Online Access |
| description | This paper presents a low power capacitance to voltage converter (CVC) circuit using two differential amplifier circuits, two Schottky rectifier diodes constructed in symmetrical manner and combined with instrumentation amplifier circuits. The differential capacitance to voltage simulation work has been realized with cheap discrete components. Combination energy from solar, vibration and heat is expected to be used to source the capacitance circuit. Constant dc voltage of 3 V has been used to source the CVC circuit in this work. It is found by the simulation, the converter circuit consumes 3.9 mW of total power, operates at 40 kHz using 400 mV excitation signal. The circuit is able to detect changes of capacitance from 4 – 12.5 pF using reference capacitance of 5 pF. Sensitivity of 0.132 mV for 1 fF capacitance change has been observed in the circuit. This circuit is suitable for wireless health monitoring system. |
| first_indexed | 2025-11-14T16:33:55Z |
| format | Article |
| id | iium-53419 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T16:33:55Z |
| publishDate | 2016 |
| publisher | IIUM Journal Publication |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-534192018-07-11T08:54:37Z http://irep.iium.edu.my/53419/ Efficient capacitance sensing for wireless health monitoring system. Che Mustapha, Nurul Arfah Alam, A. H. M. Zahirul Khan, Sheroz Azman, Amelia Wong TK Electrical engineering. Electronics Nuclear engineering This paper presents a low power capacitance to voltage converter (CVC) circuit using two differential amplifier circuits, two Schottky rectifier diodes constructed in symmetrical manner and combined with instrumentation amplifier circuits. The differential capacitance to voltage simulation work has been realized with cheap discrete components. Combination energy from solar, vibration and heat is expected to be used to source the capacitance circuit. Constant dc voltage of 3 V has been used to source the CVC circuit in this work. It is found by the simulation, the converter circuit consumes 3.9 mW of total power, operates at 40 kHz using 400 mV excitation signal. The circuit is able to detect changes of capacitance from 4 – 12.5 pF using reference capacitance of 5 pF. Sensitivity of 0.132 mV for 1 fF capacitance change has been observed in the circuit. This circuit is suitable for wireless health monitoring system. IIUM Journal Publication 2016-11 Article PeerReviewed application/pdf en http://irep.iium.edu.my/53419/1/609-3201-1-PB.pdf application/pdf en http://irep.iium.edu.my/53419/7/53419_Efficient%20capacitance%20sensing%20for%20wireless%20health%20monitoring%20system_WoS.pdf Che Mustapha, Nurul Arfah and Alam, A. H. M. Zahirul and Khan, Sheroz and Azman, Amelia Wong (2016) Efficient capacitance sensing for wireless health monitoring system. IIUM Engineering Journal, 17 (2). pp. 21-29. ISSN 1511-788X E-ISSN 2289-7860 http://journals.iium.edu.my/ejournal/index.php/iiumej/index |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Che Mustapha, Nurul Arfah Alam, A. H. M. Zahirul Khan, Sheroz Azman, Amelia Wong Efficient capacitance sensing for wireless health monitoring system. |
| title | Efficient capacitance sensing for wireless health monitoring system. |
| title_full | Efficient capacitance sensing for wireless health monitoring system. |
| title_fullStr | Efficient capacitance sensing for wireless health monitoring system. |
| title_full_unstemmed | Efficient capacitance sensing for wireless health monitoring system. |
| title_short | Efficient capacitance sensing for wireless health monitoring system. |
| title_sort | efficient capacitance sensing for wireless health monitoring system. |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| url | http://irep.iium.edu.my/53419/ http://irep.iium.edu.my/53419/ http://irep.iium.edu.my/53419/1/609-3201-1-PB.pdf http://irep.iium.edu.my/53419/7/53419_Efficient%20capacitance%20sensing%20for%20wireless%20health%20monitoring%20system_WoS.pdf |