Single Fault Activation
Manufacturing defects in silicon are modeled as nodes permanently tied to ground or power, known as stuck-at faults. Finding these defects requires generating specific input vectors that force the faulty node to behave differently than a healthy node.
A three-input combinational circuit has inputs A, B, and C. Inputs A and B feed into an AND gate to produce internal node W. Node W and input C feed into an OR gate to produce the final output Y.
A fabrication defect causes node W to be Stuck-at-0 (SA0). Determine the specific input vector required to activate this fault at the internal node.
Constraints
- Fault activation strictly requires driving the target node to the opposite logic level of the fault.
- Propagation of the fault to the primary output
Yis a separate step and is not evaluated for pure activation.
Topics
Solve this problem
Place the gates, wire them up and watch the signals settle. Every submission runs on the same simulation engine that grades it.
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