A 25A Hybrid Magnetic Current Sensor with 64mA Resolution, 1.8MHz Bandwidth, and a Gain Drift Compensation Scheme

Conference paper (2021)

Authors

A. Jouyaeian Electronic Instrumentation - EEMCS
Q. Fan Electronic Instrumentation - EEMCS
Mario Motz Infineon Technologies
Udo Ausserlechner Infineon Technologies
K.A.A. Makinwa Microelectronics
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: © 2021 A. Jouyaeian, Q. Fan, Mario Motz, Udo Ausserlechner, K.A.A. Makinwa
DOI: https://doi.org/10.1109/ISSCC42613.2021.9365767
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Published Date

2021

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

Magnetic current sensors are used in switched-mode power supplies and motor drivers, where both galvanic isolation and wide bandwidth (BW) are desired. In CMOS, Hall-effect sensors are widely used, but their resistance results in a fundamental trade-off between BW and resolution. Coils have a differentiating characteristic and so can achieve much wider BW and resolution, but cannot sense DC.