COMPUTER SCIENCE AND ENGINEERING
COMPUTER ORGANIZATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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EX-OR gate and NOR gate
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EX-OR gate and OR gate
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EX-OR gate and AND gate
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EX-NOR gate and AND gate
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Detailed explanation-1: -We know that a half adder circuit has one Ex – OR gate and one AND gate. Five NAND gates are required in order to design a half adder.
Detailed explanation-2: -The half adder is able to add two single binary digits and provide the output plus a carry value. It has two inputs, called A and B, and two outputs S (sum) and C (carry). The common representation uses a XOR logic gate and an AND logic gate.
Detailed explanation-3: -Explanation: There are 2 AND, 1 OR and 2 EXOR gates required for the configuration of full adder, provided using half adder. Otherwise, configuration of full adder would require 3 AND, 2 OR and 2 EXOR. Sanfoundry Global Education & Learning Series – Digital Circuits.
Detailed explanation-4: -The Half adder can be designed using 5 NOR gates. This is the minimum number of NOR gates to design half adder. Firstly, three NOR gates are used in the designing and the output from two of these NOR gates is given to fourth NOR gate. The output from second NOR gate is given to the gate connected at the end.