| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current sensor flexibly coping with variations in temperature characteristics of a magnetic detecting element, such as a Hall element, by making temperature compensation values adjustable even after a circuit is configured, and to provide a method of compensating temperature characteristics of a magnetic detecting element used for the current sensor. <P>SOLUTION: A voltage dividing circuit 24 includes variable resistors VR<SB>1</SB>, VR<SB>2</SB>and a positive temperature coefficient resistor R<SB>x</SB>connected in series between a power terminal 12 and a grounding terminal 14, and outputs a voltage (divided voltage V<SB>x</SB>) at a connection point between the variable resistors VR<SB>1</SB>and VR<SB>2</SB>to a constant-current circuit 18. The divided voltage V<SB>x</SB>is obtained by dividing a supply voltage V<SB>cc</SB>by the ratio of the resistance value of the variable resistor VR<SB>1</SB>to the combined resistance value of the variable resistor VR<SB>2</SB>and the positive temperature coefficient resistor R<SB>x</SB>. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
