Optimized RC timing technique for accurate measurement of minute capacitance changes

Zaharudin, Zarimin and Adam, Ismail and Abdul Kadir, Kushsairy and Khan, Sheroz and Nordin, Anis Nurashikin and Ahmed Shaikh, Faraz and Hassan Abdalla Hashim, Aisha and Abdul Malik, Noreha and Wan Morshidi, Wan Hafiy (2018) Optimized RC timing technique for accurate measurement of minute capacitance changes. In: 3rd IEEE International Conference on Engineering Technologies and Social Sciences, ICETSS 2017, 7th-8th August 2017, Bangkok, Thailand.

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Abstract

This paper presents a technique for accurate measurement of small capacitive changes. This is based on selecting the most linear part of the curve obtained by charging the capacitor undergoing changes through a known resistor value. This measurement is part of the design of a system for measuring blood glucose content non-invasively. The technique is based on measuring ultra-low low glucose levels in the blood as capacitive changes converted into RC timing constant optimized using a circuit set to trigger at an appropriate time activating a counter. The measured data is captured instant later, selecting the most linear part of the charging curve. The results so obtained are compared with the ones obtained through RC-timing standard procedure. The technique reported is with a remarkable low error of about 2.25% as against 11.78% by the standard RC-timing technique.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	3930/70502
Uncontrolled Keywords:	Capacitance, Comparator, RC timing
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering Kulliyyah of Engineering
Depositing User:	dr Sheroz Khan
Date Deposited:	27 Feb 2019 12:23
Last Modified:	27 Feb 2019 12:23
URI:	http://irep.iium.edu.my/id/eprint/70502

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