A Low Noise ASIC for Butterfly Accelerometer

DOI

10.2991/eia-17.2017.30How to use a DOI?

Keywords

butterfly accelerometer; switch-capacitor detection; gain-enhancement; common mode feedback

Abstract

An open-loop switch-capacitor detection circuit with high resolution and low noise is proposed for a butterfly accelerometer. This paper introduced the composition and realization principle of the system, proposed a C/V detection structure and a filter with high Q value. The preamplifier adopted the folded cascode structure with the gain enhancement technology to achieve high GBW and improved the phase margin. The input common mode feedback helps to achieve a high linearity detection and have an ideal dynamic detection range. All of the voltage and current are supplied by the reference source with low temperature coefficient. Under the Cadence Design System, the spectre circuit simulation is performed based on the 0.6um CMOS standard process model. The results show the detection range of the Accelerometer isñ0.1pF, sensitivity is 25V/pF, output noise is within 0.4uV/Hz1/2.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yi WANG
AU  - Shuai GUAN
AU  - Qiang XU
AU  - Zhihua CHEN
AU  - Dingbang XIAO
AU  - Xuezhong WU
PY  - 2017/07
DA  - 2017/07
TI  - A Low Noise ASIC for Butterfly Accelerometer
BT  - Proceedings of the 2017 International Conference on Electronic Industry and Automation (EIA 2017)
PB  - Atlantis Press
SP  - 143
EP  - 147
SN  - 1951-6851
UR  - https://doi.org/10.2991/eia-17.2017.30
DO  - 10.2991/eia-17.2017.30
ID  - WANG2017/07
ER  -