VLSI Potentiostat For Amperometric Measurements For Electrolytic Reactions

Author

Harpreet S. Narula
John G. Harris, Missouri University of Science and TechnologyFollow

Abstract

This paper describes a CMOS integrated potentiostatic control circuit. The design maintains a constant bias potential between the reference and working electrodes for an amperometric chemical sensor. A technique of converting input currents into time for amperometric measurements is proposed. Redox currents ranging from 1pA to 200nA can be measured with a maximum non-linearity of ±0.1% over this range. Analog inputs are processed and digital outputs are generated without requiring a power-hungry A/D converter. A prototype chip has been fabricated in the 0.5μm AMI CMOS process. Experimental results are reported showing the performance of the circuit as a chemical sensor.

Recommended Citation

H. S. Narula and J. G. Harris, "VLSI Potentiostat For Amperometric Measurements For Electrolytic Reactions," Proceedings IEEE International Symposium on Circuits and Systems, vol. 1, pp. I457 - I460, Institute of Electrical and Electronics Engineers, Sep 2004.

Department(s)

Electrical and Computer Engineering

International Standard Serial Number (ISSN)

0271-4310

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

07 Sep 2004