Patent ID: 6870372
Filing Date: 2005-03-22
Classification: H03M

Abstract:
1. An abnormality detection apparatus for a comparator comprising: an output terminal connected to an input port of a microcomputer, wherein said output terminal of said comparator is further connected to a first analog data input port of said microcomputer, and said microcomputer includes an abnormality judgment portion for judging existence/absence of abnormality of said comparator based on an output voltage of said comparator wherein a signal input terminal of said comparator is further connected to an output port of said microcomputer that is capable of outputting an H level or an L level microcomputer signal relative to a reference voltage of said comparator, and said abnormality judgment portion judges existence/absence of abnormality of said comparator based on an output level corresponding to said microcomputer signal and an output voltage of said comparator.