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$$A Digital Systemtakes a set of discrete input information

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$$Hence$,$ an important characteristic of digital systems is their ability to represent and manipulate discrete elements of information.

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$$Example: Digital Counter

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$$ Types of Digital Systems: No system state

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$$With system state State updated at discrete times

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$$ But, what do we mean by discrete elements of information? Any set that is restricted to a finite number of elements contains discrete information.

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$$Examples of discrete sets: The decimal digits

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$$Discrete elements of information are represented in a digital system by physical quantities called signals.

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$$Electrical signals such as voltages and currents are the most common.

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$$Electronic devices called transistorspredominate in the circuits that implement and manipulate these signals.

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$$The signals in most present

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day electronic digital systems use just two discrete values and are therefore said to be binary.

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$$A binary digit, called a bit, has two values:

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$$A digital system can be defined as a system that manipulates discrete elements of information

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$$represented internally in binary form." give with solution