Current-Mode CMOS A/D Converter for pA to nA Input Currents

Madalina Breten; Torsten Lehmann; Erik Bruun

Current-Mode CMOS A/D Converter for pA to nA Input Currents

Madalina Breten, Torsten Lehmann, Erik Bruun

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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.

Original language	English
Title of host publication	Proc. 17th NORCHIP Conference
Place of Publication	Copenhagen
Publisher	Technoconsult
Publication date	1999
Pages	140-145
Publication status	Published - 1999
Event	17th NORCHIP Conference - Oslo, Norway Duration: 8 Nov 1999 → 9 Nov 1999 Conference number: 17

Conference

Conference	17th NORCHIP Conference
Number	17
Country/Territory	Norway
City	Oslo
Period	08/11/1999 → 09/11/1999

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Cite this

@inproceedings{bcb3857a0a064274951dadbcc4914a79,

title = "Current-Mode CMOS A/D Converter for pA to nA Input Currents",

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.",

author = "Madalina Breten and Torsten Lehmann and Erik Bruun",

year = "1999",

language = "English",

pages = "140--145",

booktitle = "Proc. 17th NORCHIP Conference",

publisher = "Technoconsult",

note = "17th NORCHIP Conference, NORCHIP'99 ; Conference date: 08-11-1999 Through 09-11-1999",

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TY - GEN

T1 - Current-Mode CMOS A/D Converter for pA to nA Input Currents

AU - Breten, Madalina

AU - Lehmann, Torsten

AU - Bruun, Erik

N1 - Conference code: 17

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

M3 - Article in proceedings

SP - 140

EP - 145

BT - Proc. 17th NORCHIP Conference

PB - Technoconsult

CY - Copenhagen

T2 - 17th NORCHIP Conference

Y2 - 8 November 1999 through 9 November 1999

ER -