Low-power and high-sensitivity system-on-chip hall effect sensor

Liu, Bin; Sun, Yi‐Chiang; Ding, Yinjie; Cao, Patrick; Liu, Aaron; Ong, Shao Jin; Tiong, Michael; Cheng, Gong; Islam, Mohd Nurul; Jain, Rachna; Tan, T.L.; Quek, Elgin; Toh, Eng-Huat

doi:10.1109/icsens.2017.8234272

Cited by 15 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In standard CMOS implementations, the Hall probe is usually realized by a low-doped n-type well because of the higher mobility with respect to p-type wells. The thickness is defined by the diffusion depth set by the CMOS process, and cannot be changed by the designer [32]. The n-type active well is encapsulated in a p-type layer, which could be the epitaxial substrate or an isolation layer.…”

Section: Hall Plates Technologymentioning

confidence: 99%

“…For silicon Hall plates, the S I depends on temperature due to the effects of temperature on the concentration of free carriers n in the active region [35] (and, in turn, on the Hall coefficient R H ), as well as through the temperature-dependent stress effects induced by the package [97]. The temperature Graphene 1000 [32] Silicon BCD 800 [102] Silicon CMOS 250 coefficient α S I of the current-related sensitivity can vary several hundred ppm/K from the nominal value at T ∼ 300 K, usually ranging between 500 ppm/K and 0.1%/K on the basis of sensor and packaging technologies [27], [63], [97]. Note that package-free Hall plates (e.g., flip-chip bonded to ceramic substrates) can achieve even lower temperature coefficients at room temperature, yet with the same dispersion across the operating range [97].…”

Section: Sensor Modeling Andmentioning

confidence: 99%

See 1 more Smart Citation

Hall-Effect Current Sensors: Principles of Operation and Implementation Techniques

2022

View full text Add to dashboard Cite

Section: Hall Plates Technologymentioning

confidence: 99%

Section: Sensor Modeling Andmentioning

confidence: 99%

Hall-Effect Current Sensors: Principles of Operation and Implementation Techniques

2022

View full text Add to dashboard Cite

“…Other techniques to measure AC magnetic fields, such as current transformers, are often cost-prohibitive and sizeprohibitive for wide-scale implementation. There is a clear need for small, cost-effective AC magnetic field sensors [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Hall-Effect Sensor Technique for No Induced Voltage in AC Magnetic Field Measurements Without Current Spinning

Lalwani¹,

Yalamarthy

Alpert

et al. 2022

IEEE Sensors J.

View full text Add to dashboard Cite

Accurately sensing AC magnetic field signatures poses a series of challenges to commonly used Hall-effect sensors. In particular, induced voltage and lack of high-frequency spinning methods are bottlenecks in the measurement of AC magnetic fields. We describe a magnetic field measurement technique that can be implemented in two ways: 1) the current driving the Hall-effect sensor is oscillating at the same frequency as the magnetic field, and the signal is measured at the second harmonic of the magnetic field frequency, and 2) the frequency of the driving current is preset, and the measured frequency is the magnetic field frequency plus the frequency of the current. This method has potential advantages over traditional means of measuring AC magnetic fields used in power systems (e.g., motors, inverters), as it can reduce the components needed (subsequently reducing the overall cost and size) and is not frequency bandwidth limited by current spinning. The sensing technique produces no induced voltage and results in a low offset, thus preserving accuracy and precision in measurements. Experimentally, we have shown offset voltage values between 8 and 27 μT at frequencies ranging from 100 Hz to 1 kHz, validating the potential of this technique in both cases.

show abstract

“…Magnetic balance currents have the advantages of wide measurement range, fast response speed, high measurement accuracy, good linearity, and operating frequency bandwidth [1]. In recent years, the research has focused on system-on-chip [2], thermal drift [3], magnetic core structure [4] etc. In different application environments, sensors needs to be designed with different performance, accordingly.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Magnetic Balance Current Sensor Based on Magnetic Scalar Potential Volume Integral

Luo

Huang

et al. 2022

Electronics

View full text Add to dashboard Cite

In this paper, a field–circuit combined simulation method, based on the magnetic scalar potential volume integral equation (MSP-VIE) and its fast algorithms, are proposed for the transient simulation and nonlinear distortion analysis of the magnetic balance current sensor. The magnetic part of the sensor is modeled and simulated by MSP-VIE with the field matrices extracted by the method of moments. By directly implementing the magnetic field equation in the circuit, these field matrices can be regarded as equivalent circuit parameters of the magnetic part, to construct the corresponding SPICE model. Finally, the field–circuit combined model of the entire sensor is unified in a circuit, so with the SPICE solver, the transient simulation is accomplished in the time domain. Moreover, aiming at the time-consuming problem, this paper presents a corresponding fast method to accelerate the simulation. The comparison of measurement and simulation demonstrates that the proposed method not only realizes the transient simulation of the whole sensor, but also simulates some hidden performance details; thus, it can be applied to practical engineering, to guide and test the early design of the product.

show abstract

Low-power and high-sensitivity system-on-chip hall effect sensor

Cited by 15 publications

References 6 publications

Hall-Effect Current Sensors: Principles of Operation and Implementation Techniques

Hall-Effect Current Sensors: Principles of Operation and Implementation Techniques

Hall-Effect Sensor Technique for No Induced Voltage in AC Magnetic Field Measurements Without Current Spinning

Modeling and Simulation of Magnetic Balance Current Sensor Based on Magnetic Scalar Potential Volume Integral

Contact Info

Product

Resources

About