| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current sensor that can precisely detect a current value without being affected by atmospheric temperature while suppressing a rise in product cost. <P>SOLUTION: The current sensor 1 which includes an annular core 10 and measures a current value of a current flowing to a line 32 to be detected which is inserted inside the core 10 includes a reference current line 26 arranged in parallel with the line 32 to be detected, a current source circuit 28 which supplies a current whose current value is known to the reference current line 26, and an arithmetic processing circuit 30 which calculates the current value of the current flowing to the line 32 to be detected by correcting a sensor output when the current source circuit 28 supplies the current whose current value is known to the reference current line 26 based upon an increment in the sensor output. <P>COPYRIGHT: (C)2012,JPO&INPIT |
