Ask
Login
0
583views
Compare : Combinational Logic circuit and Sequential Logic circuit
written 6.2 years ago by gravatar for ypsukale ypsukale • 50 modified 2.2 years ago by gravatar for Krishna_Agrawal Krishna_Agrawal • 2.6k

Subject: Industrial Electronics

Topic: Microprocessor and Microcontrollers

Difficulty: Medium
industrial electronics
ADD COMMENT EDIT
1 Answer
0
2views
written 2.2 years ago by gravatar for Krishna_Agrawal Krishna_Agrawal • 2.6k •   modified 2.2 years ago


Combinational Circuit v/s Sequential Circuit

Sr. No. Parameters Combinational Circuit Sequential Circuit
1. Definition Combinational Circuit is the type of circuit in which output is independent of time and only relies on the input present at that particular instant. On other hand Sequential circuit is the type of circuit where output not only relies on the current input but also depends on the previous output.
2. Feedback In Combinational circuit as output does not depend on the time instant, no feedback is required for its next output generation. On other hand in case of Sequential circuit output relies on its previous feedback so output of previous input is being transferred as feedback used with input for next output generation.
3. Performances As the input of current instant is only required in case of Combinational circuit, it is faster and better in performance as compared to that of Sequential circuit. On other hand Sequential circuit are comparatively slower and has low performance as compared to that of Combinational circuit.
4. Complexity No implementation of feedback makes the combinational circuit less complex as compared to sequential circuit. However on other hand implementation of feedback makes sequential circuit more complex as compared to combinational circuit.
5. Time dependency It is not time-dependent. It uses clock pulse i.e. it is time-dependent.
6. Output Obtained Combination of operands not necessary in same sequence. Sequence of operands is necessary in sequential circuit.
7. Memory Element Memory element is not present in combinational logic circuit. Memory element is present in sequential logic circuit.
8. Elementary Blocks Elementary building blocks for combinational circuit are logic gates. On other hand building blocks for sequential circuit are flip flops..
9. Operation Combinational circuit are mainly used for arithmetic as well as Boolean operations. On other hand Sequential circuit is mainly used for storing data.
10. Example Multiplexer, De-multiplexer, Encoder, Decoder, Half-adder, Full-adder, etc. that are used for arithmetic operation and boolean operation. Flip-flops, Registers, Counters, etc. that are used to store data.



enter image description here


enter image description here
ADD COMMENT EDIT
Please log in to add an answer.