Abnormality detection apparatus of comparator

Details Abnormality detection apparatus of comparator Abnormality detection apparatus of comparator

2005-03-22

2005-03-22

Le, N. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

C714S819000

Reexamination Certificate

active

06870372

ABSTRACT:
Abnormality of a comparator is to be detected while it is assembled in a control apparatus. An output OUT of a comparator4is connected to a first analog data input port13in addition to an input port11of a microcomputer6. A pin P1as a signal input terminal of the comparator is connected to a second output port15capable of outputting an H or L microcomputer signal MO of the microcomputer and also to a second analog data input port14. An abnormality judgment portion9of the microcomputer can detect abnormality due to failure of the comparator itself and failure of the peripheral devices on the basis of the output of the comparator during a normal operation, the comparator output when the microcomputer signal is outputted, and the comparator outputs before and after the output and stop of the microcomputer signal.

REFERENCES:
patent: 4001818 (1977-01-01), Radichel et al.
patent: 4328583 (1982-05-01), Stodola
patent: 5789925 (1998-08-01), Yokotani et al.

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