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Digital circuits are the foundation of digital computers, operating on a two-valued logic system of 1s and 0s, representing "on" and "off" states. These circuits are built using logic gates, which are integrated circuits that process input signals to produce output signals.12

Key concepts include:
* Logic Gates: Basic components like AND, OR, and NOT gates, which perform specific operations based on their inputs, following the principles of Boolean algebra.1
* Binary Code: The system of representing information using only 0s and 1s, where each digit position signifies a power of 2.2
* Integrated Circuits (ICs): These components house millions of transistors and other elements, enabling complex digital functions.34

By connecting these logic gates, devices can perform arithmetic and other computational tasks.1

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