Modeling of Three-Axis Hall Effect Sensors Based on Integrated Magnetic Concentrator

Fan, Hua; Li, Sujie; Nabaei, Vahid; Feng, Quanyuan; Heidari, Hadi

doi:10.1109/jsen.2020.2989325

Cited by 17 publications

(8 citation statements)

References 20 publications

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“…As shown in Fig.5, the previously designed Hall plate model is applied to comprise a more complex measuring system. The thin disk in Fig.5 is an integrated magnetic concentrator (IMC) which changes parallel magnetic flux into perpendicular direction [13,14]. As presented in [14], by placing 4 horizontal Hall plates on the edges of IMC disk and process output signals, the strength of magnetic field in 3 axis can be measured respectively.…”

Section: Finite Element Methods Model Of Hall Sensormentioning

confidence: 99%

A Horizontal Hall Sensor 3D Comsol Model

Fan

Cen³

et al. 2020

2020 IEEE 63rd International Midwest Symposium on Circuits and Systems (MWSCAS)

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This paper presents a three-dimensional finite element method (FEM) model of horizontal Hall sensor in COMSOL Multiphysics. The model aims to simulate the sensors performance in a straightforward way and provides a means to simulate more complex applications with other physics modules. Compared with traditional two-dimensional models, the three-dimensional model is more flexible in designing Hall sensor and shows great significance in verifying the performance of sensors with different materials and geometries. By changing model parameters and comparing simulation results, an optimal design solution can be achieved effectively and economically. The presented Hall sensor achieves a sensitivity of 0.0669 V/(VT). Basic circuit modules of a complete sensor system are also introduced.

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Section: Finite Element Methods Model Of Hall Sensormentioning

confidence: 99%

A Horizontal Hall Sensor 3D Comsol Model

Fan

Cen³

et al. 2020

2020 IEEE 63rd International Midwest Symposium on Circuits and Systems (MWSCAS)

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“…To obtain an estimate for the magnetic signal V S , the Hall readout signal (7) needs to be demodulated with the c chop signal. Using (7) and the relation c 2 = 1, the demodulated Hall signal VS is obtained as:…”

Section: Hall Plate Readout Configuration and Static Offsetsmentioning

confidence: 99%

“…Hall plates are widely used as magnetic field sensors because they can be easily cointegrated with on-chip readout circuitry in nearly all standard Complementary Metal Oxide Semiconductor (CMOS) technologies. They form a cheap solution for various applications requiring contactless position sensing or galvanic isolated sensing of large electric currents [1][2][3][4][5][6][7]. A well-known disadvantage of Hall plates is their relatively large offsets compared to the weak information signal that is generated by the Hall effect [1,8,9].…”

Section: Introductionmentioning

confidence: 99%

A 2 MS/s Full Bandwidth Hall System with Low Offset Enabled by Randomized Spinning

Riem

Raman

Rombouts

2022

Sensors

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In this paper, a Hall plate readout with a randomized four-phase spinning-current scheme is proposed. The goal is to remove the maximum number of offset components, including the offset associated with spike demodulation. The outcome is that only the smallest possible offset remains, corresponding to the residual offset of the Hall plate which cannot be distinguished from the Hall signal. An additional innovation is to operate various offset-reduction loops in spread-spectrum mode, allowing the removal of error components without notching out any in-band signals. The resulting approach delivers a very large notch-free bandwidth while simultaneously reducing the Hall plate residual offset, making it an enabler for high-bandwidth Hall-based current sensors. To demonstrate the proposed techniques, we have realized a mixed-mode experimental circuit, where the analog part is implemented in a custom integrated circuit, and the digital control system in an FPGA is connected to the analog chip. Measurement results feature a Hall readout system with a notch-free bandwidth up to 820 kHz and a 47 μTrms noise floor. The input-referred Hall plate offset, based on statistical measurements on 10 samples from a single wafer, is reduced from 130±22μT to only 23±22μT.

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“…In an MRI-guided surgery, Schell et al utilized a 3-axis Hall sensor for the position detection of surgical tools. [105][106][107] The use of hall sensors provides a new approach for the development of MRIcompatible real-time magnetic tracking systems that can be integrated into MR-guided minimally invasive surgical tools. Subsequently, Yamaguchi et al installed a Hall sensor (THM1176-HF, Metrolab) in the cap for the magnetic eld detection to avoid a strong magnetic eld in the laboratory as long-term use.…”

Section: Application Iv: Assisting Mrimentioning

confidence: 99%