| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current measuring system capable of precisely switching over measuring ranges even in case of a micro-current object to be measured. <P>SOLUTION: The current measuring system includes a switching-over section 5 for measuring ranges that is switched over to one of a plurality of measuring ranges and then voltage-converts a current I at a conversion rate corresponding to the measuring range, a diode 4 for supplying the current I to the switching-over section 5, a voltage detecting section 6 for detecting a forward direction voltage Vd of the diode 4, and an arithmetic control section 9 that specifies one of a plurality of preset voltages ranges where the forward direction voltage Vd is contained corresponding to a plurality of the measuring ranges and switches over the measuring range corresponding to the specified voltage range by controlling the switching-over section 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
