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
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) | IEEE |
| Seiten | 5-8 |
| ISBN (elektronisch) | 978-1-7281-2788-0 |
| DOIs | |
| Publikationsstatus | Veröffentlicht - 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 |
|---|---|
| Kurztitel | MWSCAS |
| Land/Gebiet | USA / Vereinigte Staaten |
| Ort | Dallas |
| Zeitraum | 4/08/19 → 7/08/19 |