Influence of mechanical stress on the offset voltage of Hall devices operated with spinning current method

Steiner, Reto; Maier, C.; Mayer, Michael; Bellekom, Sandra; Baltes, H.

doi:10.1109/84.809062

Cited by 40 publications

(11 citation statements)

References 29 publications

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“…9. The offset voltage, also changing with pressure when no magnet field is applied, is caused by a variety of effect, such as fabrication process, environment properties [8]. But it takes only a small percent about 20% of the total output voltage that is the output when the magnetic field is applied.…”

Section: Exprimental Resultsmentioning

confidence: 99%

A MEMS pressure sensor based on Hall effect

Qin

Nie

et al. 2011

2011 IEEE SENSORS Proceedings

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This paper reports a microfabricated pressure sensor based on the Hall effect. A special structure is designed to characterize the pressure with a Hall voltage. To describe the properties of the devise an electromagnetism model and a mechanical model is developed. The sensor is tested under the pressure ranges from 300 hPa to 1100 hPa. The results show that the output voltage is linear to the pressure and the sensitivity is 0.0288 mV/hPa. As other Hall devices, an offset voltage exists without application of a magnetic field and it changes with the pressure as well. But compared with the Hall voltage, the offset voltage is much smaller.

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Section: Exprimental Resultsmentioning

confidence: 99%

A MEMS pressure sensor based on Hall effect

Qin

Nie

et al. 2011

2011 IEEE SENSORS Proceedings

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“…To eliminate the offset of the sensor and/or noise, the continuous signal is sampled and modulated. Commonly, the spinning current technique [6]- [7] is applied to decrease the offset of the sensing block. With the spinning current, the sensor outputs a sampled signal (V HC ).…”

Section: System Architecturementioning

confidence: 99%

A current-mode back-end for a sensor microsystem

Ajbl

Pastre

Kayal

2011

2011 IEEE 9th International New Circuits and Systems Conference

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This paper presents a voltage-to-current converter as a current-mode output buffering stage for sensor interfaces. The converter can be used in any microsystem needing a current output. It is presented here in the context of a Hall sensor microsystem. The system is fully differential with an output stage that converts a discrete input voltage into a continuous current. The Hall sensor microsystem, using the voltage-to-current back-end, has been fabricated and measured in a 0.35 ȝm CMOS technology. The entire system performs with non-linearity lower than ±0.08% and maximum output current of ±3mA.Index Terms-Current-mode ouput stage, fully integrated sensor microsystem

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“…Also contributing to the offset are all physical effects which cause an asymmetry in the potential distribution of the active region. Possible sources include piezoresistive effects [46], geometrical errors, temperature gradients, nonlinear material properties, etc. [47].…”

Section: Offset Reduction Schemesmentioning

confidence: 99%

“…The spinning current offset reduction scheme results in a limited frequency response due to the discrete sampling [54]. Therefore, a detailed knowledge of the offset sources becomes indispensable in order to choose, eg, the minimum sampling frequency in order to cancel all significant contributions [46].…”

Section: Offset Reduction Schemesmentioning

confidence: 99%