### Abstract

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 |
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Titel | Proceedings of the 62nd IEEE International Midwest Symposium on Circuits and Systems |

Publikationsstatus | Eingereicht - 2019 |

Veranstaltung | 62nd IEEE International Midwest Symposium on Circuits and Systems - Dallas, USA / Vereinigte Staaten Dauer: 4 Aug 2019 → 7 Aug 2019 |

### Konferenz

Konferenz | 62nd IEEE International Midwest Symposium on Circuits and Systems |
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Kurztitel | MWSCAS |

Land | USA / Vereinigte Staaten |

Ort | Dallas |

Zeitraum | 4/08/19 → 7/08/19 |

### Fingerprint

### Dies zitieren

*Proceedings of the 62nd IEEE International Midwest Symposium on Circuits and Systems*

**A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space.** / Auer, Mario; Scherzer, Maximilian.

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

*Proceedings of the 62nd IEEE International Midwest Symposium on Circuits and Systems.*, Dallas, USA / Vereinigte Staaten, 4/08/19.

}

TY - GEN

T1 - A High Precision Digitally-Controlled Current Source for Magnetic-Field Measurements in Space

AU - Auer, Mario

AU - Scherzer, Maximilian

PY - 2019

Y1 - 2019

N2 - 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

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

M3 - Conference contribution

BT - Proceedings of the 62nd IEEE International Midwest Symposium on Circuits and Systems

ER -