| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a data processing apparatus which can simply prevent malfunction when high frequency noise is input without accelerating a sampling frequency of an A/D converter. <P>SOLUTION: After a sampling value Sn from the A/D converter is stored, it is compared with a peak value Sp. When it is larger than the peak value Sp, the peak value Sp is updated. When the sampling value Sn is smaller than the peak value Sp, and when the sampling value Sn is smaller than offset value (OV) and the peak value Sp is larger than (0.1V), a flag is set in a storage area of a memory storing the sampling value Sn of the peak value Sp. Then, when it is judged that the number of flags in a fixed period is larger than 4, it is judged that high frequency noise is contained, and judgment by a data processing part is prohibited. <P>COPYRIGHT: (C)2007,JPO&INPIT |
