MAGNETISM MEASURING DEVICE AND MAGNETISM MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a magnetism measuring device and a magnetism measuring method by means of a magnetic impedance element capable of performing stable operation for changes of ambient temperature. SOLUTION: This magnetism measuring device carries a high frequency current to a magnetic impedance element whose impedance varies in accordance with intensity of a magnetic field when it is placed in the magnetic field and converts the current into a DC voltage by detecting phases of a terminal voltage of the element to measure intensity of the magnetic field. The device is featured by having a phase detecting and smoothing part for converting the terminal voltage of the element into the DC voltage by a switch operating in synchronization with a frequency of the high frequency current. The switch is a semiconductor switch using a junction transistor or FET.