5.6 A 25A Hybrid Magnetic Current Sensor with 64mA Resolution, 1.8MHz Bandwidth, and a Gain Drift Compensation Scheme
Amirhossein Jouyaeian, Qinwen Fan, Mario Motz, Udo Ausserlechner, Kofi A. A. Makinwa
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.
Topics & Concepts
Bandwidth (computing)Compensation (psychology)Current (fluid)Electronic engineeringComputer scienceControl theory (sociology)Electrical engineeringTelecommunicationsEngineeringPsychologyPsychoanalysisControl (management)Artificial intelligenceMagnetic Field Sensors TechniquesSensor Technology and Measurement SystemsElectrical and Bioimpedance Tomography