Design and Construction of Ferrite Based High Sensitive Fluxgate Sensor using Multiple Feedback Band-Pass Filter

International Journal of Applied Physics
© 2022 by SSRG - IJAP Journal
Volume 9 Issue 3
Year of Publication : 2022
Authors : Samson Dauda Yusuf, Husseini Umar Arafat, Jibrin Abdullahi

How to Cite?

Samson Dauda Yusuf, Husseini Umar Arafat, Jibrin Abdullahi, "Design and Construction of Ferrite Based High Sensitive Fluxgate Sensor using Multiple Feedback Band-Pass Filter," SSRG International Journal of Applied Physics, vol. 9,  no. 3, pp. 19-33, 2022. Crossref,


The importance of magnetic sensors in their use to explain some of the complex phenomena relating to geomagnetic storms and solar-terrestrial systems, most of them still have problems of sensitivity, noise level and linearity due to the magnetic material used in designing them. This study developed a ferrite-based, highly sensitive Fluxgate Sensor (FS) for earth's magnetic field explorations using Manganese Zinc (MnZn) ferrite alloy ring core material. The characteristic of the fluxgate sensor was modeled using a trans-impedance operational amplifier and high-quality band-pass filter using multiple feedback band-pass filter MFB-BPF. The result shows that with an optimum core diameter of 12.82mm and excitation current of 25mA, the core was saturated at an excitation frequency of 2kHz with the maximum magnetic field of ±49.44μT (i.e. 4.34V towards the North Pole with corresponding field 49.44μT(49,440nT) and 0.187V towards South Pole with the corresponding field -49.44μT(-49,440nT)) and sensitivity of 87.78mV/μT was realized. The developed FS has reduced sensor dimension, less power consumption, enhanced sensitivity, less noise level and lower fabrication cost, thus meeting the earth's magnetic field studies requirements.


Fluxgate sensor, Manganese Zinc Ferrite, Multiple feedback, Alloy ring, Operational amplifiers, Magnetic field.


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