what are digital signals?

Digital signals are the signals that represent data in terms of a sequence of discrete values. However, it is important to note that the digital signal can only assume one value (out of a given, finite number of possible values) at a given point of time. A simple digital signal is a signal that represents information via discrete bands of analog levels. However, the information state represented by all the levels falling under a band is the same. The digital signals in digital circuits can typically have only two (possible) values. Such signals are commonly referred to as logic signals or binary signals.

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