ECE354 S'09 hw7 - sol

ECE354 S'09 hw7 - sol - NEW JERSEY INSTITUTE OF TECHNOLOGY...

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NEW JERSEY INSTITUTE OF TECHNOLOGY ACADEMIC YEAR 2008-2009 SEMESTER 2 ECE354 DIGITAL TEST S OLUTION HW7 1. There are two paths from the site of the fault to the output. We choose to propagate the effect of the fault along the path shown in Fig. 1. The figure also displays the forward tracing conditions needed. A B C D F 1 g 2 g 3 g 4 g 5 g 6 g 7 g 8 g 9 g 10 g 11 g G1 G2 G3 G4 G5 G6 D D D D 1 1 0 Fig. 1. Forward tracing through the bold-faced path Completion of the backward tracing for this path is shown in Fig. 2. A B C D F 1 g 2 g 3 g 4 g 5 g 6 g 7 g 8 g 9 g 10 g 11 g G1 G2 G3 G4 G5 G6 D D D D 1 1 0 1 1 0 0 Fig. 2. Line justification The computed test pattern is ABCD =1100 (=12). There are other tests possible (see HW3). 2. There are two paths from the site of the fault to the output. We choose first to propagate the effect of the fault along the path shown in Fig. 3. The figure also displays the forward tracing conditions needed. The backward tracing for this path does, however, fail (see Fig. 4). The
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This note was uploaded on 02/18/2010 for the course ECET 354 taught by Professor Sa during the Spring '07 term at NJIT.

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ECE354 S'09 hw7 - sol - NEW JERSEY INSTITUTE OF TECHNOLOGY...

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