Conference paper
Current-Mode CMOS A/D Converter for pA to nA Input Currents
In
Proc. 17th Norchip Conference
—
1999, pp. 140-145
Abstract
This paper describes a current mode A/D converter designed for a maximum input current range of 5nA and a resolution of the order of 1pA. 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 0.7micron 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 |
|---|---|
| Publisher: | Technoconsult |
| Year: | 1999 |
| Pages: | 140-145 |
| Proceedings: | 17th NORCHIP Conference |
| Types: | Conference paper |
| ORCIDs: | Bruun, Erik |
