发明名称 |
DEVICE AND METHOD FOR DIAGNOSIS OF FAULT IN MULTI-CHANNEL ANALOG INPUT OUTPUT CIRCUIT |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and method for diagnosis of a fault capable of simultaneously detecting the fault of a multiplexer used for a multi-channel analog input-output circuit and the fault of an A/D converter, and classifying the causes of the faults. Ž<P>SOLUTION: A diagnosis voltage input unit inputs test voltage values different per channel of a multiplexer to the multiplexer having a plurality of channels configuring an analog signal conversion unit and to the A/D converter for converting the output of the multiplexer into a digital signal. Then, a digital voltage value output per channel is compared with the input test voltage value to determine whether a fault is in the multiplexer or the A/D converter on the basis of results of comparison. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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申请公布号 |
JP2010212808(A) |
申请公布日期 |
2010.09.24 |
申请号 |
JP20090054194 |
申请日期 |
2009.03.06 |
申请人 |
HITACHI LTD |
发明人 |
TERAE NAO;ISHIKAWA MASAKAZU;FURUTA YASUYUKI;YOSHIDA KATSUMI;NISHIOKA ATSUSHI;KIYOFUJI YASUHIRO;KASAHARA TAKENORI;NAGAYAMA SHUICHI;KAWAKAZU FUJIYA;KUBOTA MANABU;OTANI TATSUYUKI;TANAKA HIDECHIYO |
分类号 |
H03K17/00;G01R31/316;H03M1/10 |
主分类号 |
H03K17/00 |
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