A 0.18µm CMOS 2nd Order Sigma-Delta Modulator for Low-power Biosensor Applications

Ryan Selby; Tom Chen

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Paper

A 0.18µm CMOS 2nd Order Sigma-Delta Modulator for Low-power Biosensor Applications

Topics: Low-Power Design; Microelectronics

In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 0BIOSTEC, 5-9, 2013 , Barcelona, Spain

Authors: Ryan Selby and Tom Chen

Affiliation: Colorado State University, United States

Keyword(s): Sigma-Delta Modulator, Biosensor.

Related Ontology Subjects/Areas/Topics: Biomedical Engineering ; Biomedical Instruments and Devices ; Low-Power Design ; Microelectronics

Abstract: Silicon biosensors are becoming increasingly popular for the study of cell growth and movement in biological systems. These biosensors need small, low power, highly accurate sensors and analog to digital converters (ADCs) in order to generate chemical images of small tissue samples. Low-power and low-voltage design is key in battery operated systems, and the size of the circuits need to be kept small such that arrays of sensors can be placed on each chip. This paper presents a low-voltage, low-power, 2nd order Sigma-Delta modulator for use in an electrochemical biosensor system. The modulator was designed using a commercial 0.18μm CMOS process with a supply voltage of 0.9V. With an input signal bandwidth of 1kHz it achieves a SNDR of 61.2dB using an over-sampling ratio of 500. Power dissipation is 165μW and it occupies 0.0225mm2 of silicon area.

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Paper citation in several formats:

Selby, R. and Chen, T. (2013). A 0.18µm CMOS 2nd Order Sigma-Delta Modulator for Low-power Biosensor Applications. In Proceedings of the International Conference on Biomedical Electronics and Devices (BIOSTEC 2013) - BIODEVICES; ISBN 978-989-8565-34-1; ISSN 2184-4305, SciTePress, pages 5-9. DOI: 10.5220/0004187100050009

@conference{biodevices13,
author={Ryan Selby. and Tom Chen.},
title={A 0.18µm CMOS 2nd Order Sigma-Delta Modulator for Low-power Biosensor Applications},
booktitle={Proceedings of the International Conference on Biomedical Electronics and Devices (BIOSTEC 2013) - BIODEVICES},
year={2013},
pages={5-9},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004187100050009},
isbn={978-989-8565-34-1},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the International Conference on Biomedical Electronics and Devices (BIOSTEC 2013) - BIODEVICES
TI - A 0.18µm CMOS 2nd Order Sigma-Delta Modulator for Low-power Biosensor Applications
SN - 978-989-8565-34-1
IS - 2184-4305
AU - Selby, R.
AU - Chen, T.
PY - 2013
SP - 5
EP - 9
DO - 10.5220/0004187100050009
PB - SciTePress