Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga

This thesis presents integrated circuit design of readout interfacing circuit to allow measuring EGFET sensing response in an array, utilizing a single reference electrode. The research area covers discrete and integrated circuit design of the proposed circuit. Two constant-voltage constant-current...

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Main Author:	Guliga, Hasliadi
Format:	Thesis
Language:	English
Published:	2017
Subjects:	Electrochemical analysis
Online Access:	https://ir.uitm.edu.my/id/eprint/38022/1/38022.pdf
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id	my-uitm-ir.38022
record_format	uketd_dc
spelling	my-uitm-ir.380222023-01-26T09:02:54Z Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga 2017 Guliga, Hasliadi Electrochemical analysis This thesis presents integrated circuit design of readout interfacing circuit to allow measuring EGFET sensing response in an array, utilizing a single reference electrode. The research area covers discrete and integrated circuit design of the proposed circuit. Two constant-voltage constant-current (CVCC) readout interfacing circuit architectures were designed and investigated. Through the experimental investigation, it was found that the CVCC readout interfacing circuit with source follower configuration has better performance than gate feedback configuration in terms of power consumption and response to pH. The chosen readout interfacing circuit was further designed in Mentor Graphics EDA tool using SilTerra's CL130G technology design kit. Based on the simulation analyses, it was found that the high-swing cascode current sources/sinks (CSS) and three-stage operational amplifier had better performances over the other sub-modules. Body-effect elimination circuit technique was also presented in this research to solve body-effect problem of the EGFET sensor and thus improved the output pH-sensitivity. The output pH-sensitivity based on the simulation results was improved from 36.4 mV/pH to 50 mV/pH, while in the postfabrication measurement results, the sensitivity increases from 40.7 mV/pH to 51.8 mV/pH. Power consumption was successfully reduced by 250 % as a result of shifting from dual to single supply in discrete design, followed by a further 135 % as a result miniaturization from 3 V to 2.5 V supply. For the circuit array measurement, the average output pH-sensitivity for six sensors using a single reference electrode was less than 3 % error from the average input. The proposed integrated circuit was able to extract the EGFET sensing response with significant reduction of power consumption using a single reference electrode for an array setup. 2017 Thesis https://ir.uitm.edu.my/id/eprint/38022/ https://ir.uitm.edu.my/id/eprint/38022/1/38022.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Electrical Engineering Abdullah, Wan Fazlida Hanim
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Abdullah, Wan Fazlida Hanim
topic	Electrochemical analysis
spellingShingle	Electrochemical analysis Guliga, Hasliadi Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
description	This thesis presents integrated circuit design of readout interfacing circuit to allow measuring EGFET sensing response in an array, utilizing a single reference electrode. The research area covers discrete and integrated circuit design of the proposed circuit. Two constant-voltage constant-current (CVCC) readout interfacing circuit architectures were designed and investigated. Through the experimental investigation, it was found that the CVCC readout interfacing circuit with source follower configuration has better performance than gate feedback configuration in terms of power consumption and response to pH. The chosen readout interfacing circuit was further designed in Mentor Graphics EDA tool using SilTerra's CL130G technology design kit. Based on the simulation analyses, it was found that the high-swing cascode current sources/sinks (CSS) and three-stage operational amplifier had better performances over the other sub-modules. Body-effect elimination circuit technique was also presented in this research to solve body-effect problem of the EGFET sensor and thus improved the output pH-sensitivity. The output pH-sensitivity based on the simulation results was improved from 36.4 mV/pH to 50 mV/pH, while in the postfabrication measurement results, the sensitivity increases from 40.7 mV/pH to 51.8 mV/pH. Power consumption was successfully reduced by 250 % as a result of shifting from dual to single supply in discrete design, followed by a further 135 % as a result miniaturization from 3 V to 2.5 V supply. For the circuit array measurement, the average output pH-sensitivity for six sensors using a single reference electrode was less than 3 % error from the average input. The proposed integrated circuit was able to extract the EGFET sensing response with significant reduction of power consumption using a single reference electrode for an array setup.
format	Thesis
qualification_level	Master's degree
author	Guliga, Hasliadi
author_facet	Guliga, Hasliadi
author_sort	Guliga, Hasliadi
title	Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
title_short	Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
title_full	Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
title_fullStr	Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
title_full_unstemmed	Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga
title_sort	integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / hasliadi guliga
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Electrical Engineering
publishDate	2017
url	https://ir.uitm.edu.my/id/eprint/38022/1/38022.pdf
_version_	1783734450261065728

Integrated readout interfacing circuit design for extended-gate fieldeffect transistor electrochemical sensor array measurement / Hasliadi Guliga

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