Hybrid Contactless Current Sensors in Standard CMOS
A. Jouyaeian (TU Delft - Electronic Instrumentation)
K.A.A. Makinwa – Promotor (TU Delft - Microelectronics)
Q. Fan – Copromotor (TU Delft - Electronic Components, Technology and Materials)
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Abstract
This thesis presents the design and realization of high-performance hybrid contactless current sensors implemented in standard CMOS technology. The research addresses a key challenge in contactless current measurement: achieving simultaneously wide bandwidth, high resolution, and low drift while maintaining low cost. Conventional contactless sensing elements such as Hall plates and pick-up coils each exhibit complementary strengths—Hall plates offer DC sensing but limited signal-to-noise ratio (SNR) at high frequencies, whereas pick-up coils provide high-frequency sensitivity but cannot detect DC. This work proposes and demonstrates hybrid CMOS sensors that combine both elements in a single architecture, exploiting their advantages to obtain a flat frequency response from DC to several MHz.