Title | A CMOS potentiostat for amperometric chemical sensors |
Publication Type | Journal Article |
Year of Publication | 1987 |
Authors | Turner, R. F. B., D. J. Harrison, and H. P. Baltes |
Journal | Solid-State Circuits, IEEE Journal of |
Volume | 22 |
Pagination | 473 - 478 |
Date Published | jun. |
ISSN | 0018-9200 |
Keywords | biomedical measurement, chemical variables measurement, CMOS integrated circuits, electric sensing devices, Electrochemical analysis |
Abstract | A simple CMOS integrated potentiostatic control circuit is described. The circuit maintains a constant bias potential between the reference and working electrodes. Chemical concentration signals are converted amperometrically to an output voltage with a slope of approximately 60 mV/ mu;A. Redox currents from 0.1 to 3.5 mu;A can be measured with a maximum nonlinearity of plusmn;2% over this range. This design also provides the capability of performing differential measurements in order to null the effect of spurious background current. The total power consumption is less than 2 mW. Experimental results are reported showing the performance of the circuit as a chemical sensor control system. |
URL | http://dx.doi.org/10.1109/JSSC.1987.1052753 |
DOI | 10.1109/JSSC.1987.1052753 |