Novel Advances in Microsystems Technologies and Their Applications

12	Technologies for Electric Current Sensors G. Velasco-Quesada, A. Conesa-Roca and M. Román-Lumbreras

CONTENTS

12.1    Introduction

12.1.1    Definition of Voltage and Electric Current

12.1.2    Direct and Indirect Measure of Current Intensity

12.2    Key Parameters of Electric Current

12.2.1    Magnitude

12.2.2    Bandwidth, Frequency and Phase

12.3    Fundamental Physical Principles for Electric Current Intensity Measurement

12.3.1    Current Sensors Based on Ohm’s Law

12.3.2    Current Sensors Based on Faraday’s Law of Electromagnetic Induction

12.3.2.1    Current Transformer

12.3.2.2    Rogowski Coil

12.3.3    Magnetic Field Sensors

12.3.3.1    Hall Effect Current Sensor

12.3.3.2    Fluxgate Current Sensor

12.3.3.3    Magnetoresistance ...