The sequential circuit needs the previous outputs for its functioning in order to produce accurate results whereas the devices built using the combinational circuit do not require the previous output for its operation. The sequential circuit needs the feedback for their functioning, on the other hand the combinational circuit does not require any feedback.On The other hand in combinational circuits the basic devices like adders, subtracters, encoders so on. Sequential circuits are used in flip-flops, latches and registers. Where as in the, sequential circuits clock is used. No clock used in the combinational circuit.The combinational circuits use the current input for generating the output on the contrary the sequential circuits input decides the current output of the given input by considering their previous output.The combinational circuit doesn’t have the potential to store the data, on the other hand the sequential circuits can store a specific amount of data.You may also like: Difference between Semaphore and Mutex Table of Difference Basis of comparison Combinational circuits Sequential circuits Storage capacity Not storing any data Stores data Clock No clock is used Clock is used Application Used in adders, encoders and multiplexers Used in flip flops Basic Output does not depends upon the present input Output depends upon the present output Feedback No feedback is required Feedback is required Pivotal Differences Between Combinational and Sequential Circuit The sequential circuits have memory elements That are not easy to use and handle. Since the sequential circuits are clock-dependent they need to do the triggering. Sequential logic circuits are usually named as the Bi Stable device or the two-state device. The Elementary building blocks of the sequential circuits are Flip-flops.they are mainly used for storing the data. its is also time-dependent and slow compared to the combinational circuit In the Sequential circuits, there exists a feedback path between input and output. They are designed tough as compared to combinational circuits. The Sequential Circuits are those whose output depends upon present as well as past input. They are easy to use and handle.The design part of the combinational circuits are really easy to implement.Įxamples – Encoder, Decoder, Multiplexer, Demultiplexer What is Sequential Circuit? These circuits will not have any memory element. Overview of sequential logic Basic concepts An example 2 Sequential vs. This implies that we are storing previous value, for which a latch is required. No condition of your code is satisfied, which means that the output will be unchanged. Consider the case when both the inputs a and b are 0. The combinational circuit does not have a clock so there won’t be any triggering. 2 Answers Sorted by: 6 This will synthesize to sequential logic.
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