Method and apparatus for detecting positive and negative runt pu

Details Method and apparatus for detecting positive and negative runt pu Method and apparatus for detecting positive and negative runt pu

1996-01-11

1997-05-13

Canney, Vincent P.

Excavating

371 6, G06F 1160

Patent

active

056299478

ABSTRACT:
The present invention comprises a runt fault detector which detects positive and negative runt faults based only upon the crossings of a high voltage threshold and a low voltage threshold. Specifically, the runt fault detector detects a positive runt fault when an input signal transitions from below to above the low voltage threshold and then back below the low voltage threshold without first transitioning from below to above the high voltage threshold. The runt fault detector also detects a negative runt fault when an input signal transitions from above to below the high voltage threshold and then back above the high voltage threshold without first transitioning from above to below the low voltage threshold. Simultaneous detection of both positive and negative runt faults may also be achieved by the present invention.

REFERENCES:
patent: 3976940 (1976-08-01), Chau et al.
patent: 4100532 (1978-07-01), Farnbach
patent: 4107651 (1978-08-01), Martin
patent: 4495621 (1985-01-01), Nakagomi et al.
patent: 4495642 (1985-01-01), Zellmer
patent: 4829521 (1989-05-01), Southard
patent: 4965800 (1990-10-01), Farnbach

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