CMOS Wide-Bandwidth Magnetic Sensors for Contactless Current Measurements

Doctoral thesis (2019)

Authors

Research Group

Electronic Instrumentation () (TU Delft)

DOI: https://doi.org/10.4233/uuid:38dfa450-82c2-4b63-92d1-26b2eb3adeed

CMOS Multipath Hall sensor Wide bandwidth Current sensor Ripple reduction loop (RRL) Pick-up coils Multisensor system Spinning Current Hybrid sensor system

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Published Date

2019

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

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.

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