Autocalibration Of Silicon Hall Devices

Simon, Pascal; Vries, P.H.S. de; Middelhoek, S.

doi:10.1109/sensor.1995.721789

Cited by 11 publications

(3 citation statements)

References 1 publication

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“…For the device tests under dc conditions, a Hall device driving current of 0.9 mA was used and an offset of 2 mV was observed in this case. The Hall voltage seen in this case is 1.6-2 times higher than the earlier reported results for a similar device configuration [3]. For higher current levels beyond 10 mA, the heat generated by the planar coil dominates, and the Hall voltage shows a drift with time.…”

Section: Measurements and Test Resultscontrasting

confidence: 57%

“…The Hall device planar coil assembly can be used in magnetic sensing applications, out of which the most straightforward applications would be current sensing and power sensing [2]. A planar coil and Hall device combination without a magnetic core has been reported in the literature and have been used in an offset compensation scheme, yet with thin film technology [3]. A combination of four planar coils/Hall device assembly has also been reported with an improved current-magnetic field transfer ratio [4].…”

Section: Introductionmentioning

confidence: 99%

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A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

Gamage¹,

Henderson²

2006

J. Micromech. Microeng.

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Hall effect devices have experienced extensive use, particularly for current sensing and power metering applications. Silicon Hall effect devices give low sensitivity compared to other materials such as InSb, owing to its relatively low electron and Hall mobilities. However, in identifying a relatively inexpensive solution in a planar format compatible with established processing techniques, silicon is ideal. In this work, the performance of an inexpensive silicon Hall effect device with an integrated planar coil is discussed for use in various applications such as power monitoring. The rectangular conventional Hall device was fabricated on n-type epitaxial silicon while the integrated planar coil was fabricated using electroplated copper. The choice of electroplated copper over a thin film evaporated metal was to enhance the current handling capability of the planar coil, thereby increasing the magnetic field generated. However, a limit to current exists as higher current levels heat the substrate, resulting in a drift in the Hall voltage. In an effort to confine the magnetic field, an electrolytically deposited Ni/Fe core was introduced to the planar coil. Measurements show that the magnetic core configuration improves the sensitivity of the assembly by a factor of 1.6. Depending upon theconditions, such as frequency and current bias, unamplified sensitivities from 8.6 to 10 µV mA−1 were observed.

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Section: Measurements and Test Resultscontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

Gamage¹,

Henderson²

2006

J. Micromech. Microeng.

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show abstract

“…In this case, the non-linearity is due to the pneumatic pump characteristic that can be higher than 20 % of its full scale range. Hence, a progressive polynomial calibration technique [26]- [29], using three calibration points, was used to perform the linearization of the relationship between the output pressure of the pneumatic pump (p) and the voltage that is applied to its input (Vm). So, using the function, p(V m ) according to the following set of conditions,…”

Section: Self-calibration Self-testing and Fault Detectionmentioning

confidence: 99%

A Smart Measurement and Stimulation System to Analyze and Promote Non-Nutritive Sucking of Premature Babies

Pereira¹,

Postolache²,

Girão³

2011

Measurement Science Review

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This paper presents a complete system that can be used to measure and to stimulate sucking abilities of premature babies. The system integrates measurement and stimulation capabilities that can be used separately or together. The sensing unit includes mainly a pressure sensor, a conditioning circuit and a microcontroller device. The stimulation unit includes a miniature and lowcost pneumatic pump, an electro-valve, and a conditioning circuit. The microcontroller is shared by both units. The system's software includes a routine that is used to define the waveform parameters of the synthesized pressure signals, a wavelet based routine that is used to process measurement data and a software component to perform fault detection and diagnosis. The system capabilities include self-calibration and self-testing. Throughout the paper several implementation details and experimental results will be presented and discussed.

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Microsensors for Magnetic Fields

Roumenin

2006

MEMS: A Practical Guide to Design, Analysis, and Applications

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Autocalibration Of Silicon Hall Devices

Cited by 11 publications

References 1 publication

A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

A Smart Measurement and Stimulation System to Analyze and Promote Non-Nutritive Sucking of Premature Babies

Microsensors for Magnetic Fields

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