Combinational Logic Circuits

In a combinational logic circuit, the output depends only on the current state or 'combination' of inputs. The behaviour of this type of system may be defined using a truth table, or a Boolean expression. Combinational logic systems range in complexity from single logic gates (AND, OR, NOT, etc.), to larger systems constructed using these basic building blocks.

The behaviour of combinational logic systems contrasts with sequential logic, in which the output depends not only only the current inputs, but also on the internal state of the system.

Logic Gates

Representing Logic-based Systems

Boolean Algebra

Simplification of Combinational Logic Circuits

Applications of Combinational Logic

Logic Families

Logic Family Characteristics

Special Purpose Output Circuits

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