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Frequency dependency analysis for differential capacitive sensor

Che Mustapha, Nurul Arfah and Alam, A. H. M. Zahirul and Khan, Sheroz and Azam, Amelia Wong (2019) Frequency dependency analysis for differential capacitive sensor. Bulletin of Electrial Engineering and Informatics, 8 (3). pp. 789-797. ISSN 2089-3191 E-ISSN 2302-9285

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Abstract

A differential capacitive sensing technique is discussed in this paper. The differential capacitive sensing circuit is making use of a single power supply. The design focus for this paper is on the excitation frequency dependency analysis to the circuit. Theory of the differential capacitive sensor under test is discussed and derivation is elaborated. Simulation results are shown and discussed. Next, results improvement has also been shown in this paper for comparison. Test was carried out using frequency from 40 kHz up to 400 kHz. Results have shown output voltage of Vout = 0.07927 Cx + 1.25205 and good linearity of R-squared value 0.99957 at 200 kHz. Potential application for this capacitive sensor is to be used for energy harvesting for its potential power supply.

Item Type: Article (Journal)
Additional Information: 3930/74619
Uncontrolled Keywords: Differential capacitive sensor CVC Frequency analysis Discrete elements Sensor sensitivity
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Dr AHM Zahirul Alam
Date Deposited: 06 Sep 2019 09:20
Last Modified: 12 Nov 2019 14:20
URI: http://irep.iium.edu.my/id/eprint/74619

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