COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Multiplexer
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Demultiplexer
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Encoder
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All of them
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Detailed explanation-1: -The combinational circuits also have three types: arithmetic and logical circuits, data handling combinational circuits and code converting combinational circuits. Encoders, decoders, multiplexers and demultiplexers fall in these categories.
Detailed explanation-2: -A multiplexer is a combinational circuit.
Detailed explanation-3: -In a digital system, the logic circuits can be divided into two classes: combinational and sequential. A combinational circuit uses logic gates only; a sequential circuit uses flip-flops (ffs) and logic gates. The discussion of ffs is left to the next chapter. Most of the flip-flops are synchronous.
Detailed explanation-4: -Which of the following is not a combinational circuit? Explanation: Since counter makes use of either clock signal or previous output to determine next state. Therefore, counter is a sequential circuit and all the others like multiplexer, adder and code convertors are the examples of combinational circuit.