| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an energization detector that can easily detect whether a current flows or not. SOLUTION: The energization detector 1 is positioned near a fuse device 21, and the middles of a first and a second magnetoresistive element 6a and 6b are positioned over a fuse wire, when the first and second magnetoresistive elements 6a and 6b detect a magnetic field generated by a current flowing in the fuse wire. Magnetic field components detected respectively by the first and second magnetoresistive elements 6a and 6b are input into a differential amplifier 12. Since the magnetic field components are the same in magnitude and opposite in polarity, the differential amplifier 12 doubles an output from one component. According to the value of the output of the differential amplifier 12, an LED bar display driver 15 blinks light-emitting diodes 16 of a bar display 3 in a sequential flow, and controls the number of blinked light-emitting diodes 16 on the basis of a current value.</p> |
