| http://www.w3.org/ns/prov#value | - FIG. 12 is a timing chart for a case in which an anomaly has occurred in the A phase digital signal SigA. If, due to short-circuiting of the A phase signal line with the power supply line or for some other reason, the A phase digital signal SigA is fixed at ???H??? level, when the difference between the count values CountA1, CountB1 of the counters 335A, 335B becomes larger than a prescribed thres
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