CMOS Wide-Bandwidth Magnetic Sensors for Contactless Current Measurements

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...

A Hybrid Multi-Path CMOS Magnetic Sensor with 76 ppm/°C Sensitivity Drift and Discrete-Time Ripple Reduction Loops

This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The...

Parameter study of velocity damped vibration energy harvesters

Existing research on vibration energy harvesting is often limited to two-parameter optimizations and single-frequency operation. In this paper a parameter study is performed on the four major design parameters of velocity-damped vibration energy harvesters in low frequency and wide bandwidth operation. The study is based on electromagnetic...

Design of a Wide-Bandwidth Magnetic Field Sensor

The combination of Hall sensors and coils can be a practical solution for obtaining a CMOS-compatible contactless current sensor with high bandwidth. A current sensitivity of 1mV/A is achieved by the Hall sensors, and the coils have a current sensitivity of about 8mV/A?µs-1. The current sensitivity is influenced by the actual die position inside...