A system-on-chip digital pH meter for use in a wireless diagnostic capsule

Hammond, P.A., Ali, D. and Cumming, D.R.S. (2005) A system-on-chip digital pH meter for use in a wireless diagnostic capsule. IEEE Transactions on Biomedical Engineering, 52(4), pp. 687-694. (doi: 10.1109/TBME.2005.844041)



Publisher's URL: http://dx.doi.org/10.1109/TBME.2005.844041


This paper describes the design and implementation of a system-on-chip digital pH meter, for use in a wireless capsule application. The system is organized around an 8-bit microcontroller, designed to be functionally identical to the Motorola 6805. The analog subsystem contains a floating-electrode ISFET, which is fully compatible with a commercial CMOS process. On-chip programmable voltage references and multiplexors permit flexibility with the minimum of external connections. The chip is designed in a modular fashion to facilitate verification and component re-use. The single-chip pH meter can be directly connected to a personal computer, and gives a response of 37 bits/pH, within an operating range of 7 pH units.

Item Type:Articles
Keywords:CMOS, ISFET, pH, system-on-chip.
Glasgow Author(s) Enlighten ID:Cumming, Professor David
Authors: Hammond, P.A., Ali, D., and Cumming, D.R.S.
Subjects:R Medicine > R Medicine (General)
Q Science > QC Physics
T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Biomedical Engineering
Publisher:Institute of Electrical and Electronics Engineers (IEEE)
Copyright Holders:Copyright © 2005 IEEE
First Published:First published in IEEE Transactions on Biomedical Engineering 52(4):687-694
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
292521Scalable nanotechnology for integrated sensor arraysDavid CummingEngineering & Physical Sciences Research Council (EPSRC)GR/A10987Electronic and Nanoscale Engineering