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 IpA to 200nA can be measured with a maximum non-linearity of ±0.1% over this range. The design can be used to generate a cyclic voltammogram for an electrochemical reaction by sweeping the voltages across the range specified by the user. 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, "Integrated VLSI Potentiostat For Cyclic Voltammetry In Electrolytic Reactions," Proceedings IEEE Computer Society Annual Symposium on VLSI Emerging Trends in VLSI Systems Design, pp. 268 - 270, Institute of Electrical and Electronics Engineers, Sep 2004.
The definitive version is available at https://doi.org/10.1109/ISVLSI.2004.1339552
Department(s)
Electrical and Computer Engineering
International Standard Book Number (ISBN)
978-076952097-1
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
24 Sep 2004
