Conference paper
Integrating data converters for picoampere currents from electrochemical transducers
This paper describes a current mode A/D converter designed for a maximum input current range of 5 nA and a resolution of the order of 1 pA. The converter is designed for a potentiostat for amperometric chemical sensors and provides a constant polarization voltage for the measuring electrode. A prototype chip using the dual slope conversion method has been fabricated in a 0.7 μm CMOS process.
Experimental results from this converter are reported. Design problems and limitations of the converter are discussed and a new conversion technique providing a larger dynamic range and easy calibration is proposed.
Language: | English |
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Publisher: | IEEE |
Year: | 2000 |
Pages: | 709-712 |
Proceedings: | 2000 IEEE International Symposium on Circuits and Systems |
Journal subtitle: | Proceedings |
ISBN: | 0780354826 and 9780780354821 |
Types: | Conference paper |
DOI: | 10.1109/ISCAS.2000.857591 |
ORCIDs: | Bruun, Erik |