4.2.3. Fault Coverage

Try these first

1. 1.

   Define fault coverage.

   Hint

   Think about what measuring the ability to catch faults means.

2. 2.

   What are stuck-at faults?

   Hint

   Consider the behavior of signals in a circuit.

3. 3.

   What is fault coverage?

   • The total number of faults
   • The proportion of detectable faults
   • A testing method

   Hint

   Think about what quality standards are in measures of testing.

4. 4.

   Stuck-at faults can lead to circuit failures. True or False?

   • True
   • False

   Hint

   Consider the implications of a signal being unable to change.

5. 5.

   Design a BIST system that maximizes detection efficiency for both stuck-at and transition faults. What tests would you include?

   Hint

   Think about how incorporating multiple patterns enhances fault coverage.

6. 6.

   Analyze a real-world scenario where delay faults could critically impact a system’s functionality. How would BIST mitigate these risks?

   Hint

   Consider the role of timing specifications in high-speed designs.