A Low Noise ASIC for Butterfly Accelerometer
- 10.2991/eia-17.2017.30How to use a DOI?
- butterfly accelerometer; switch-capacitor detection; gain-enhancement; common mode feedback
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.
- © 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/).
Cite this article
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 -