Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/717021
Title: A Digitally Compensated AMR Magnetometer
Other Titles: IEEE Transactions on Magnetics
Authors: David Novotný|Vojtěch Petrucha|Michal Janošek
subject: digital feedback|magnetic sensor|commercial off-the-shelf (COTS)|STM32|Anisotropic magneto-resistance (AMR)
Year: -1-Uns- -1
Abstract: This paper considers the possibilities of using digital feedback for precise anisotropic magneto-resistance (AMR) magnetometers using commercial off-the-shelf (COTS) components. Requiring only a few analog parts, most of the signal processing is done digitally within an STM32 microcontroller. Because most of the precision is made by the feedback circuit, the analog-to-digital converter (ADC) can be a low-cost type. The compensation source is made with a pulsewidth modulation-driven H-bridge sourced from a voltage reference, so the cost reduction when compared to a “full-analog” design is large. The demodulation of a flipped-AMR signal is done with software after the AD conversion because it improves the offset stability and brings the reduction of the preamp's and ADC's LF noise. This paper presents the full characterization of a real instrument, including its noise, linearity, stability, and power consumption.
URI: http://localhost/handle/Hannan/717021
ISBN: 0018-9464
volume: Volume
issue: Issue
Appears in Collections:New Ieee 2019

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Title: A Digitally Compensated AMR Magnetometer
Other Titles: IEEE Transactions on Magnetics
Authors: David Novotný|Vojtěch Petrucha|Michal Janošek
subject: digital feedback|magnetic sensor|commercial off-the-shelf (COTS)|STM32|Anisotropic magneto-resistance (AMR)
Year: -1-Uns- -1
Abstract: This paper considers the possibilities of using digital feedback for precise anisotropic magneto-resistance (AMR) magnetometers using commercial off-the-shelf (COTS) components. Requiring only a few analog parts, most of the signal processing is done digitally within an STM32 microcontroller. Because most of the precision is made by the feedback circuit, the analog-to-digital converter (ADC) can be a low-cost type. The compensation source is made with a pulsewidth modulation-driven H-bridge sourced from a voltage reference, so the cost reduction when compared to a “full-analog” design is large. The demodulation of a flipped-AMR signal is done with software after the AD conversion because it improves the offset stability and brings the reduction of the preamp's and ADC's LF noise. This paper presents the full characterization of a real instrument, including its noise, linearity, stability, and power consumption.
URI: http://localhost/handle/Hannan/717021
ISBN: 0018-9464
volume: Volume
issue: Issue
Appears in Collections:New Ieee 2019

Files in This Item:
File Description SizeFormat 
08506418.pdf1.12 MBAdobe PDFThumbnail
Preview File
Title: A Digitally Compensated AMR Magnetometer
Other Titles: IEEE Transactions on Magnetics
Authors: David Novotný|Vojtěch Petrucha|Michal Janošek
subject: digital feedback|magnetic sensor|commercial off-the-shelf (COTS)|STM32|Anisotropic magneto-resistance (AMR)
Year: -1-Uns- -1
Abstract: This paper considers the possibilities of using digital feedback for precise anisotropic magneto-resistance (AMR) magnetometers using commercial off-the-shelf (COTS) components. Requiring only a few analog parts, most of the signal processing is done digitally within an STM32 microcontroller. Because most of the precision is made by the feedback circuit, the analog-to-digital converter (ADC) can be a low-cost type. The compensation source is made with a pulsewidth modulation-driven H-bridge sourced from a voltage reference, so the cost reduction when compared to a “full-analog” design is large. The demodulation of a flipped-AMR signal is done with software after the AD conversion because it improves the offset stability and brings the reduction of the preamp's and ADC's LF noise. This paper presents the full characterization of a real instrument, including its noise, linearity, stability, and power consumption.
URI: http://localhost/handle/Hannan/717021
ISBN: 0018-9464
volume: Volume
issue: Issue
Appears in Collections:New Ieee 2019

Files in This Item:
File Description SizeFormat 
08506418.pdf1.12 MBAdobe PDFThumbnail
Preview File