Patent ID: 9329213
Filing Date: 2016-05-03
CPC Classification: G01R

Claim Text:
1. A power measuring apparatus for measuring power to be consumed by a load connected to a power supply through a connection line, which comprises: a pair of connection ends for connecting the power measuring apparatus to the power supply in parallel with the load; a magnetic film part including a magnetic film; a sensor element having a pair of sensor terminals provided on both ends of the magnetic film part, disposed adjacent to the connection line with an insulating layer interposed therebetween in such a manner that a direction of a current flowing through the magnetic film part between the sensor terminals is substantially in parallel with a direction of a current flowing through the connection line, wherein one of the sensor terminals is connected to one of the connection ends; a measurement resistor with one end connected to the other of the sensor terminals of the sensor element and the other end connected to the other of the connection ends; a voltage detecting unit for measuring voltage between measurement terminals using the respective sensor terminals as the measurement terminals; n numbers of bandpass filters arranged to be connected in parallel between the measurement resistor and the voltage detecting unit; and a bandpass filter having a switch capable of selecting n or less numbers of the bandpass filters out of the n numbers of the bandpass filters.