Exam-style question
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In a synchronous sequential circuit, the clock signal ensures that:.
- A.outputs change asynchronously
- B.outputs change at random times
- C.outputs change simultaneously
- D.outputs never change
Model answer
What a good answer should say
- outputs change simultaneously
Explanation
Why this works
Formula/rule: Synchronous operation requires all sequential elements to change state on the same clock edge. Substitution: The common clock period T synchronises all flip‑flops.
Working: When the clock edge occurs, every flip‑flop samples its input and updates its output at the same instant, preventing race conditions. Answer: outputs change simultaneously.
Units/conclusion: The clock signal guarantees that all state changes happen together.
Common mistake
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