Question

Identify the static 1-hazards in the following circuit. State the condition under which each hazard can occur. Draw a timing diagram (similar to Figure 1–10(b)) that shows the sequence of events when a hazard occurs.

Answer 1

Two static 1-hazards exist in the given circuit: one when input A transitions from 0 to 1 and another when input B transitions from 0 to 1. Both hazards occur due to delayed output transitions.

Step-by-step explanation:

In the given circuit, there are two static 1-hazards:

1. Static 1-hazard 1:
2. Condition: When input A transitions from 0 to 1 while input C is already at 0.
3. Timing diagram:
4. Static 1-hazard 2:
5. Condition: When input B transitions from 0 to 1 while input A is already at 1 and input C is already at 0.
6. Timing diagram:

In both cases, the hazards occur due to the delayed transition of outputs. The timing diagrams show that there is a delay in the output transitions when hazards occur.