Everything about Combinational Logic totally explained
In
digital circuit theory,
combinational logic (also called
combinatorial logic) is a type of logic circuit whose output is a
pure function of the present input only. This is in contrast to
sequential logic, in which the output depends not only on the present input but also on the history of the input.
In other words, sequential logic has
memory while combinational logic does not.
Combinational logic is used in
computer circuits to do
Boolean algebra on input signals and on stored data. Practical computer circuits normally contain a mixture of combinational and sequential logic. For example, the part of an arithmetic logic unit, or
ALU, that does mathematical calculations is constructed in accord with combinational logic, although the ALU is controlled by a sequencer that's constructed in accord with sequential logic.
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