(a) vary smoothly, then change abruptly to new values. (b) consist of codes of high-level and low-level signals. (c) vary smoothly continuously. (d) have periods of high-level and low-level signals, then change to continuous signals.
Answer
Answer : (b)
Explanation
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Introduction to Digital Systems » Exercise - 12. Analog signals : (a) vary smoothly, then change abruptly to new values. (b) consist of codes of high-level and low-level signals. (c) vary smoothly continuously. (d) have periods of high-level and low-level signals, then change to continuous signals.