Option D is incorrect because a Combinational logic circuit cannot have memory, while a Sequential logic circuit can have memory (in the form of flip-flops or latches) to store the previous input values. Option C is incorrect because both Combinational and Sequential logic circuits can be built from the same logic gates (AND, OR, NOT, NAND, NOR, etc.). The main difference between a combinational and a sequential circuit is that a combinational circuits output is only dependent on the input available at. Option A is incorrect because both Combinational and Sequential logic circuits can have a change in input that propagates immediately to the output. The presence of feedback distinguishes between sequential and combinational networks. The correct answer is B) A Combinational logic circuit's output depends solely on the values that are present on the inputs now, while a Sequential logic circuit can depend on previous inputs. In other words, the output is a function of the current input values and the state of the circuit (which is determined by the previous input values).īased on these definitions, we can now answer the question. Sequential logic circuit: A sequential logic circuit is a type of logic circuit where the output depends not only on the current input values but also on the previous input values. In other words, the output is a function of the current input values only. Also known as 'combinatorial logic,' it refers to a digital logic function made of primitive logic gates (AND, OR, NOT, etc.) in which all outputs of the function are directly. Now, let's define Combinational logic circuit and Sequential logic circuit.Ĭombinational logic circuit: A combinational logic circuit is a type of logic circuit where the output depends solely on the values that are present on the inputs now. A logic circuit is an electronic circuit that performs a specific logical operation on one or more input signals to produce an output signal. In automata theory, sequential logic is a type of logic circuit whose output depends on the present value of its input signals and on the sequence of past inputs, the input history. First, we need to understand what a logic circuit is. Combinational circuits combine the inputs and the outputs, but sequential circuits combine the outputs only after generating the inputs.
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