Combinational Logic Design

Combinational logic system is characterized by the basic property that the Outputs being the function only of the current combination of inputs. Thus it exhibits memory less or stateless attributes as well as implies acyclic connection of the primitives. Combinational circuits are known for the ease of debugging as the backtracing through them is uncomplicated owing to the unidirectional nature of the inputs. They are also less prone to glitches, races, hazards and thus more reliable in producing the desired output. Another popular term used for the combinational logic circuits is ‘decision making circuits’ as they combine the logic functions together to yield a decisive output. A thumb rule for identification of the combinational logic circuit is no level-sensitive or edge-sensitive statement, as well as flip-flops, registers etc.