| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve detection accuracy by eliminating influence of detection error without lowering continuity of detected voltage values. <P>SOLUTION: A first voltage dividing circuit for dividing a detection target voltage and a second voltage dividing circuit for dividing a reference voltage are provided, and influence of leak currents of clamp diodes D1, D2 and influence of offset voltages of buffer circuits BF1, BF2 are eliminated, by input the divided detection target voltages and the divided reference voltages to the buffer circuits BF1,BF2 respectively through the clamp diodes D1, D2 to obtain a difference voltage between the detection target voltage and the reference voltage based on output voltages of the buffer circuits BF1, BF2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
