A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space

Mario Auer; Maximilian Scherzer

doi:10.1109/MWSCAS.2019.8884931

A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space

Mario Auer, Maximilian Scherzer

Institut für Elektronik (4390)

Publikation: Beitrag in Buch/Bericht/Konferenzband › Beitrag in einem Konferenzband › Begutachtung

Abstract

For spaceborne sensors power-efficient and lightweight circuitry is required, therefore, integrated solutions are preferred. In this paper an integrated current source is presented that can be used in the front-end of a fluxgate- magnetometer. A “radiation aware” design paradigm was followed to account for parameter shifts due to ionizing radiation and allow for radiation hardening without changing the topology.
The digital current source achieves a dynamic range of more than 19 bits. It is based on a Delta-Sigma modulator with a digital pulse-width modulator as a quantizer. The digital-to- analog conversion is performed using a current-steering cell that employs chopping to minimize flicker noise. A fully-differential amplifier is used to drive an improved Howland current source.
Index Terms—current source, precision, radiation hardness, Delta-Sigma

Originalsprache	englisch
Titel	2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS)
Herausgeber (Verlag)	Institute of Electrical and Electronics Engineers
Seiten	5-8
ISBN (elektronisch)	978-1-7281-2788-0
DOIs	https://doi.org/10.1109/MWSCAS.2019.8884931
Publikationsstatus	Veröffentlicht - 2019
Veranstaltung	62nd IEEE International Midwest Symposium on Circuits and Systems - Dallas, USA / Vereinigte Staaten Dauer: 4 Aug. 2019 → 7 Aug. 2019

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Konferenz	62nd IEEE International Midwest Symposium on Circuits and Systems
Kurztitel	MWSCAS
Land/Gebiet	USA / Vereinigte Staaten
Ort	Dallas
Zeitraum	4/08/19 → 7/08/19

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A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space. / Auer, Mario ; Scherzer, Maximilian.
2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS). Institute of Electrical and Electronics Engineers, 2019. S. 5-8.

Publikation: Beitrag in Buch/Bericht/Konferenzband › Beitrag in einem Konferenzband › Begutachtung

Auer, M & Scherzer, M 2019, A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space. in 2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS). Institute of Electrical and Electronics Engineers, S. 5-8, 62nd IEEE International Midwest Symposium on Circuits and Systems
, Dallas, Texas, USA / Vereinigte Staaten, 4/08/19. https://doi.org/10.1109/MWSCAS.2019.8884931

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title = "A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space",

abstract = "For spaceborne sensors power-efficient and lightweight circuitry is required, therefore, integrated solutions are preferred. In this paper an integrated current source is presented that can be used in the front-end of a fluxgate- magnetometer. A “radiation aware” design paradigm was followed to account for parameter shifts due to ionizing radiation and allow for radiation hardening without changing the topology.The digital current source achieves a dynamic range of more than 19 bits. It is based on a Delta-Sigma modulator with a digital pulse-width modulator as a quantizer. The digital-to- analog conversion is performed using a current-steering cell that employs chopping to minimize flicker noise. A fully-differential amplifier is used to drive an improved Howland current source.Index Terms—current source, precision, radiation hardness, Delta-Sigma",

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AB - For spaceborne sensors power-efficient and lightweight circuitry is required, therefore, integrated solutions are preferred. In this paper an integrated current source is presented that can be used in the front-end of a fluxgate- magnetometer. A “radiation aware” design paradigm was followed to account for parameter shifts due to ionizing radiation and allow for radiation hardening without changing the topology.The digital current source achieves a dynamic range of more than 19 bits. It is based on a Delta-Sigma modulator with a digital pulse-width modulator as a quantizer. The digital-to- analog conversion is performed using a current-steering cell that employs chopping to minimize flicker noise. A fully-differential amplifier is used to drive an improved Howland current source.Index Terms—current source, precision, radiation hardness, Delta-Sigma

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A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space

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