Exam-style question
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What is the primary purpose of a clock signal in a sequential circuit?.
- A.provide power
- B.provide timing reference
- C.provide data
- D.provide reset
Model answer
What a good answer should say
- provide timing reference
Explanation
Why this works
Formula/rule: In sequential logic, a clock signal provides a periodic timing reference that synchronises state changes. Substitution: The clock period T determines when flip‑flops sample their inputs.
Working: When a clock edge occurs, each flip‑flop captures its input and updates its output, ensuring all elements change state together. Answer: provide timing reference.
Units/conclusion: The clock signal ensures synchronous operation of the circuit.
Common mistake
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