ECE354 hw5 - sol

ECE354 hw5 - sol - NEW JERSEY INSTITUTE OF TECHNOLOGY DEPT....

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Unformatted text preview: NEW JERSEY INSTITUTE OF TECHNOLOGY DEPT. OF ELECTRICAL & COMPUTER ENGINEERING ACADEMIC YEAR 2008-2009 SEMESTER 1 ECE354 DIGITAL TEST S OLUTION HW5 1. We first try to propagate the fault effect through the upper path: A B C D F 1 g 2 g 3 g 4 g 5 g 6 g 7 g 8 g 9 g 1 0 g 1 1 g D D 1 1 D D Fig. 1. Forward tracing through the bold-faced path G1 G2 G3 G4 G5 G6 Completion of the backward tracing for this path, however, fails (line justification through G5): A B C D F 1 g 2 g 3 g 4 g 5 g 6 g 7 g 8 g 9 g 1 0 g 1 1 g D D 1 1 D D Fig. 2. Failure of the line justification backward through G5 G1 G2 G3 G4 G5 G6 1 1 Since the value on line 8 g is already is already committed to D, the line justification cannot be completed. A new propagation path needs to be tried. We try now the lower path: 1 A B C D F 1 g 2 g 3 g 4 g 5 g 6 g 7 g 8 g 9 g 1 0 g 1 1 g D D 1 1 Fig. 3. Forward tracing through the bold-faced path G1 G2 G3 G4 G5 G6 D D The backward tracing for this path can now be completed successfully: A...
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ECE354 hw5 - sol - NEW JERSEY INSTITUTE OF TECHNOLOGY DEPT....

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