In the sequential circuit the present output depends upon the present inputs and also depends on the past output. These circuits are mainly used for the Arithmetic(Addition, Subtraction, Multiplication and Division) and the Boolean Functions.The example of these circuits is Half Adder, Full Adder, magnitude compactor and de-multiplexer.This is because they are used in the various applications. There are many types of the combinational circuits are existing in which the multiplexer and the de- multiplexer are significant.The feedback is not required in this type of circuit.The combinational circuits are more costly than the sequential circuits.The designing of these type of circuit is easier.The combinational circuits are not time dependent.Any change in the input will be reflected at the output terminal of the combinational circuits.On the other hand, the combinational circuits have not the ability to store the present state and to retain the previous state.These circuits are very expensive because the large number of gates are required in the operation of the combinational circuits. ![]()
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