Question

From the basics, design a BCD adder. Demonstrate the addition 9 and 8 using the adder with stepwise results.​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

BCD stand for binary coded decimal. Suppose, we have two 4-bit numbers A and B. The value of A and B can varies from 0(0000 in binary) to 9(1001 in binary) because we are considering decimal numbers.

The output will varies from 0 to 18, if we are not considering the carry from the previous sum. But if we are considering the carry, then the maximum value of output will be 19 (i.e. 9+9+1 = 19).

When we are simply adding A and B, then we get the binary sum. Here, to get the output in BCD form, we will use BCD Adder.

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