A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor

Yasser Rezaeiyan; Nikolaj  Lykkeberg Madsen; Tim Bohnert; Milad Zamani; Sonal Shreya; Elvira Paz; Hooman Farkhani; Ricardo Ferreira; Farshad Moradi

doi:10.1109/NorCAS58970.2023.10305454

A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor

Yasser Rezaeiyan^*, Nikolaj Lykkeberg Madsen, Tim Bohnert, Milad Zamani, Sonal Shreya, Elvira Paz, Hooman Farkhani, Ricardo Ferreira, Farshad Moradi

^*Corresponding author for this work

Department of Electrical and Computer Engineering - Electronics and Photonics

Research output: Contribution to book/anthology/report/proceeding › Article in proceedings › Research › peer-review

Abstract

Magnetic Tunnel Junction (MTJ) based sensors can function over a very wide range of magnetic fields, from pico tesla range to several milli-tesla. They have the potential to replace many currently used types of magnetic sensors in industrial and biomedical applications. This paper presents a readout channel using a double magneto-resistor (MR) bridge and a high-side current reference. The sensor system features offset cancellation and an intrinsic low-pass filter. The proposed magnetic sensor works with a linearity of better than 0.3% THD in a magnetic field range of ±0.5 mT and a bandwidth of 10 kHz. The measurement results show that the sensor input-referred noise power spectral density is 25.4 nVrms/√Hz at 100Hz equals 1.27 nT/√Hz.

Original language	English
Title of host publication	2023 IEEE Nordic Circuits and Systems Conference (NorCAS)
Number of pages	4
Publisher	IEEE
Publication date	Nov 2023
DOIs	https://doi.org/10.1109/NorCAS58970.2023.10305454
Publication status	Published - Nov 2023
Event	IEEE Nordic Circuits and Systems Conference - Denmark, Aalborg Duration: 31 Oct 2023 → 1 Nov 2023

Conference

Conference	IEEE Nordic Circuits and Systems Conference
Location	Denmark
City	Aalborg
Period	31/10/2023 → 01/11/2023

Keywords

Magnetic sensors
Readout channel
magnetic noise
magnetic tunnel junctions (MTJs)

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10.1109/NorCAS58970.2023.10305454

Cite this

@inproceedings{207c230e650542debf8471de766abcc0,

title = "A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor",

abstract = "Magnetic Tunnel Junction (MTJ) based sensors can function over a very wide range of magnetic fields, from pico tesla range to several milli-tesla. They have the potential to replace many currently used types of magnetic sensors in industrial and biomedical applications. This paper presents a readout channel using a double magneto-resistor (MR) bridge and a high-side current reference. The sensor system features offset cancellation and an intrinsic low-pass filter. The proposed magnetic sensor works with a linearity of better than 0.3% THD in a magnetic field range of ±0.5 mT and a bandwidth of 10 kHz. The measurement results show that the sensor input-referred noise power spectral density is 25.4 nVrms/√Hz at 100Hz equals 1.27 nT/√Hz.",

keywords = "Magnetic sensors, Readout channel, magnetic noise, magnetic tunnel junctions (MTJs)",

author = "Yasser Rezaeiyan and {Lykkeberg Madsen}, Nikolaj and Tim Bohnert and Milad Zamani and Sonal Shreya and Elvira Paz and Hooman Farkhani and Ricardo Ferreira and Farshad Moradi",

year = "2023",

month = nov,

doi = "10.1109/NorCAS58970.2023.10305454",

language = "English",

booktitle = "2023 IEEE Nordic Circuits and Systems Conference (NorCAS)",

publisher = "IEEE",

note = "IEEE Nordic Circuits and Systems Conference , NorCAS ; Conference date: 31-10-2023 Through 01-11-2023",

}

Rezaeiyan, Y, Lykkeberg Madsen, N, Bohnert, T, Zamani, M , Shreya, S, Paz, E, Farkhani, H, Ferreira, R & Moradi, F 2023, A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor. in 2023 IEEE Nordic Circuits and Systems Conference (NorCAS). IEEE, IEEE Nordic Circuits and Systems Conference , Aalborg, 31/10/2023. https://doi.org/10.1109/NorCAS58970.2023.10305454

TY - GEN

T1 - A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor

AU - Rezaeiyan, Yasser

AU - Lykkeberg Madsen, Nikolaj

AU - Bohnert, Tim

AU - Zamani, Milad

AU - Shreya, Sonal

AU - Paz, Elvira

AU - Farkhani, Hooman

AU - Ferreira, Ricardo

AU - Moradi, Farshad

PY - 2023/11

Y1 - 2023/11

N2 - Magnetic Tunnel Junction (MTJ) based sensors can function over a very wide range of magnetic fields, from pico tesla range to several milli-tesla. They have the potential to replace many currently used types of magnetic sensors in industrial and biomedical applications. This paper presents a readout channel using a double magneto-resistor (MR) bridge and a high-side current reference. The sensor system features offset cancellation and an intrinsic low-pass filter. The proposed magnetic sensor works with a linearity of better than 0.3% THD in a magnetic field range of ±0.5 mT and a bandwidth of 10 kHz. The measurement results show that the sensor input-referred noise power spectral density is 25.4 nVrms/√Hz at 100Hz equals 1.27 nT/√Hz.

AB - Magnetic Tunnel Junction (MTJ) based sensors can function over a very wide range of magnetic fields, from pico tesla range to several milli-tesla. They have the potential to replace many currently used types of magnetic sensors in industrial and biomedical applications. This paper presents a readout channel using a double magneto-resistor (MR) bridge and a high-side current reference. The sensor system features offset cancellation and an intrinsic low-pass filter. The proposed magnetic sensor works with a linearity of better than 0.3% THD in a magnetic field range of ±0.5 mT and a bandwidth of 10 kHz. The measurement results show that the sensor input-referred noise power spectral density is 25.4 nVrms/√Hz at 100Hz equals 1.27 nT/√Hz.

KW - Magnetic sensors

KW - Readout channel

KW - magnetic noise

KW - magnetic tunnel junctions (MTJs)

UR - http://www.scopus.com/inward/record.url?scp=85179514900&partnerID=8YFLogxK

U2 - 10.1109/NorCAS58970.2023.10305454

DO - 10.1109/NorCAS58970.2023.10305454

M3 - Article in proceedings

BT - 2023 IEEE Nordic Circuits and Systems Conference (NorCAS)

PB - IEEE

T2 - IEEE Nordic Circuits and Systems Conference

Y2 - 31 October 2023 through 1 November 2023

ER -

A low-noise high-linear wide dynamic-range MTJ-based magnetic field sensor

Abstract

Conference

Keywords

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