Notes for 1.1B Digital and Analog Systems - IB | RevisionDojo
1.1B Digital and Analog Systems Notes
Digital Systems
Digital systems use the binary numeral system for functionality.
A number system that uses only two digits: 0 and 1.
0 represents a negative/false input, whereas 1 represents a positive/true input.
Digital systems use binary to represent data because:
Simplicity: Binary only uses two states, 0 and 1, which correspond to the off and on states of electronic components.
Reliability: Binary is less prone to errors compared to other number systems.
Efficiency: Binary can represent complex data types using simple combinations of 0s and 1s.
Note
1 Byte = 8 Bits
Larger data sizes are measured in kilobytes (KB), megabytes (MB), gigabytes (GB), and so on.
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What is the binary numeral system?
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Note
Introduction to Digital Systems
Digital systems are electronic systems that process and store data using discrete values, typically represented by binary code.
The foundation of digital systems is the binary numeral system, which uses only two digits: 0 and 1.
In digital systems, 0 represents an off state, while 1 represents an on state.
AnalogyThink of binary code like a light switch - it can only be either on (1) or off (0), with no states in between.
DefinitionBinary Numeral SystemA number system that uses only two digits: 0 and 1.
ExampleWhen you press a key on your keyboard, it sends a binary signal to your computer, which then processes it as either a 0 or 1.
