Physical parameter sensor with self-diagnosis circuit

摘要

A physical parameter sensor that can detect changes in data that is stored beforehand in the data storage section for adjustments when the changes in the data are not corrected by a majority-decision circuit section. The physical parameter sensor can prevent the use of an output signal obtained by adjustments based on incorrect data. The physical parameter sensor has a self-diagnosis circuit section that detects whether a plurality of data words stored in a data storage section is identical or not and outputs an error signal, if the identical data words have been altered to become nonidentical.