| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a four-wire temperature measuring resistor input circuit which, in spite of having a simple structure, can accurately measure temperature and is highly accurate with few errors due to ambient environment and secular change. <P>SOLUTION: In spite of having the simple structure in which two constant current sources are provided, two constant resistances for reference are connected in series, and a switch for switching the constant current is provided, a highly accurate resistance value (measured value of a temperature sensor) with few errors can be measured in consideration of the ambient environment and the secular change or the like. <P>COPYRIGHT: (C)2012,JPO&INPIT |
