Academic Journal
A Hybrid Magnetic Current Sensor With a Dual Differential DC Servo Loop
| العنوان: | A Hybrid Magnetic Current Sensor With a Dual Differential DC Servo Loop |
|---|---|
| المؤلفون: | Jouyaeian, A. (author), Fan, Q. (author), Ausserlechner, Udo (author), Motz, Mario (author), Makinwa, K.A.A. (author) |
| سنة النشر: | 2023 |
| المجموعة: | Delft University of Technology: Institutional Repository |
| مصطلحات موضوعية: | Bandwidth, Capacitors, Coils, Contactless sensing, dc servo loop (DSL), DSL, high resolution, hybrid current sensors, magnetic current sensing, Magnetic tunneling, Sensors, Servomotors, temperature compensation |
| الوصف: | This article presents a hybrid magnetic current sensor for contactless current measurement. Pick-up coils and Hall plates are employed to sense the high and low-frequency fields, respectively, generated by a current-carrying conductor. Due to the differentiating characteristic of the pick-up coils, a flat frequency response can then be obtained by summing the outputs of the coil and the Hall paths and passing the result through a 1st-order low-pass filter (LPF). For maximum resolution, the LPF corner frequency (2 kHz) is set such that the noise contribution of each path is equal. To suppress the coil-path offset without the use of large ac coupling capacitors, an area-efficient dual dc servo loop (D3SL) is used. This effectively suppresses the coil-path offset, resulting in a total offset of 73 μT , which is mainly dominated by the Hall path. Fabricated in a standard 0.18-μm CMOS process, the current sensor occupies 3.9 mm2 and draws 7.1 mA from a 1.8 V supply. It achieves 43 mA resolution in a 5 MHz bandwidth, which is 1.5 × better than the state-of-the-art hybrid sensors. It also achieves the lowest energy efficiency FoM (3.5 ×) among CMOS magnetic current sensors. ; Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; Electronic Instrumentation ; Electronic Components, Technology and Materials ; Microelectronics |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | http://www.scopus.com/inward/record.url?scp=85171581375&partnerID=8YFLogxK; IEEE Journal of Solid State Circuits--0018-9200--376c240b-9af2-4618-aefd-e3ea35ef546e; http://resolver.tudelft.nl/uuid:554b020c-10b2-4ba2-9b98-a7c4f13af2d0; https://doi.org/10.1109/JSSC.2023.3307471 |
| DOI: | 10.1109/JSSC.2023.3307471 |
| الاتاحة: | http://resolver.tudelft.nl/uuid:554b020c-10b2-4ba2-9b98-a7c4f13af2d0 https://doi.org/10.1109/JSSC.2023.3307471 |
| Rights: | © 2023 A. Jouyaeian, Q. Fan, Udo Ausserlechner, Mario Motz, K.A.A. Makinwa |
| رقم الانضمام: | edsbas.F1EE12F3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1109/JSSC.2023.3307471 |
|---|