CMOS Wide-Bandwidth Magnetic Sensors for Contactless Current Measurements

Junfeng Jiang

Research output: ThesisDissertation (TU Delft)

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This Ph.D. dissertation describes the theory and realization of wide-bandwidth magnetic sensors for current measurements which breach the conventional offset and noise constraints in CMOS processes. These are achieved by several circuit-level and system-level innovations, including the use of three orthogonal ripple reduction loops (RRLs) in spinning-current Hall sensors, a multipath
architecture with double Hall sensors, and a hybrid magnetic sensor system combining Hall sensors and pick-up coils. The prototypes with these techniques have advanced the bandwidth of state-of-the-art CMOS magnetic sensors by more than two orders of magnitude.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Delft University of Technology
  • Makinwa, K.A.A., Supervisor
Thesis sponsors
Award date25 Apr 2019
Print ISBNs978-94-6384-025-5
Publication statusPublished - 2019


  • CMOS
  • Hall sensor
  • wide bandwidth
  • current sensor
  • ripple reduction loop (RRL)
  • pick-up coils
  • Multipath
  • Multisensor system
  • Spinning Current
  • Hybrid sensor system

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