Fault judging device comprising a compression circuit for compre

Details Fault judging device comprising a compression circuit for compre Fault judging device comprising a compression circuit for compre

1991-10-31

1994-10-04

Harvey, Jack B.

Excavating

36457104, 364578, G06F 1128

Patent

active

053532899

ABSTRACT:
In a fault judging device for use in simulating a circuit model which is defined by a fault data signal indicative of one of circuit elements in the circuit model and which is operable in response to first through n-th input pattern signals to produce first through n-th output pattern signals, a compression circuit compresses the first through the n-th output pattern signals by cyclic coding to produce a compressed signal represented by a cyclic code sequence. A comparator compares the cyclic code sequence with a specific code sequence which defines a normal circuit related to the circuit model. The comparator produces a comparison result signal, as a judging result signal, representative of fault of one of the circuit elements when the cyclic code sequence does not coincide with the specific cyclic code sequence.

REFERENCES:
patent: 4725971 (1988-02-01), Doshi et al.
patent: 4937770 (1990-06-01), Samuels et al.
patent: 4945503 (1990-03-01), Takasaki
patent: 4996659 (1991-02-01), Yamaguchi et al.
patent: 5058112 (1991-10-01), Namitz et al.

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