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

Mario Auer, Maximilian Scherzer

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

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
Originalspracheenglisch
Titel 2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS)
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seiten5-8
ISBN (elektronisch)978-1-7281-2788-0
DOIs
PublikationsstatusVeröffentlicht - 2019
Veranstaltung62nd IEEE International Midwest Symposium on Circuits and Systems
- Dallas, USA / Vereinigte Staaten
Dauer: 4 Aug 20197 Aug 2019

Konferenz

Konferenz62nd IEEE International Midwest Symposium on Circuits and Systems
KurztitelMWSCAS
LandUSA / Vereinigte Staaten
OrtDallas
Zeitraum4/08/197/08/19

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  • Dieses zitieren

    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) (S. 5-8). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/MWSCAS.2019.8884931