A CMOS hall sensor modelling with readout circuitry and microcontroller processing for magnetic detection

Fan, H., Zhang, J., Zuo, S., Hu, Q., Feng, Q. and Heidari, H. (2021) A CMOS hall sensor modelling with readout circuitry and microcontroller processing for magnetic detection. Review of Scientific Instruments, 92(3), 034707. (doi: 10.1063/5.0038295)

Abstract

A Hall sensor array system for magnetic field detection and analysis is realized in X-FAB 0.18 μm CMOS technology. Magnetic field detection is attributed to the magnetization of metal coils to metal particles and the sensing characteristics of the Hall sensor array. The system puts forward a complete solution from Hall sensors, analog front-end circuit, analog-to-digital converter (ADC) to microcontroller unit. Using Ansoft Maxwell and COMSOL Multiphysics software for simulation verification, the minimum diameter of magnetic particles that can be detected in the system is 2 μm. The measured signal to noise and distortion ratio, spurious free dynamic range, and effective number of bits of the proposed ADC are 70.61 dB, 90.08 dB, and 11.44-bit, respectively. The microsystem based on STM32 combines hardware and software design, which can effectively adjust the motion parameters and realize the real-time display in the LCD screen of the magnetic field and voltage information. Compared to the prior system, the portability, cost, and efficiency have been considerably improved, which is aimed at the rapid measurement of heavy metal particles such as Fe, Co, and Ni in ambient air and blood.

• Item Type: Articles
• Additional Information: The work of Hua Fan was supported by the National Natural Science Foundation of China (NSFC) under Grant 61771111, supported by Sichuan Provincial Science and Technology Important Projects under Grant 19ZDYF2863, Supported by the Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices under Grant KFJJ202006. The work of Quanyuan Feng was supported by the Major Project of the National Natural Science Foundation of China (NSFC) under grant 62090012, supported by the National Natural Science Foundation of China (NSFC) under Grant 61531016, supported by Sichuan Provincial Science and Technology Important Projects under Grant 2018GZ0139, 2018ZDZX0148 and 2018GZDZX0001.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Zuo, Dr Siming and Heidari, Professor Hadi
• Authors: Fan, H., Zhang, J., Zuo, S., Hu, Q., Feng, Q., and Heidari, H.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Review of Scientific Instruments
• Publisher: American Institute of Physics
• ISSN: 0034-6748
• ISSN (Online): 1089-7623
• Published Online: 10 March 2021
• Copyright Holders: Copyright © 2021 AIP Publishing
• First Published: First published in Review of Scientific Instruments 92(3):034707
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher