Diagnostic circuit utilizing bidirectional test data comparisons

Details Diagnostic circuit utilizing bidirectional test data comparisons Diagnostic circuit utilizing bidirectional test data comparisons

1985-10-21

1987-07-28

Smith, Jerry

Excavating

371 15, 371 68, 324 73R, G01R 3128, G06F 1100

Patent

active

046835695

ABSTRACT:
Test points are connected in parallel to shift registers which are read out bidirectionally. Comparisons are then made of the data in each direction of shift and inconsistencies of the compared signals, from a reference data signal, cannot only indicate which test point has an error present thereat, but whether and which stage of a shift register employed in the present diagnostic system is inoperative.

REFERENCES:
patent: 3582633 (1971-06-01), Webb
patent: 3863215 (1975-01-01), McGrogan
patent: 4257031 (1981-03-01), Kirner
patent: 4404677 (1983-09-01), Grande

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