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Explain the operation of octal to binary encoder.
Ans
Octal to binary encoder consists of eight inputs, one for each of eight digits and three outputs which generate the consequent binary number. For example: low order output bit Z is if the input octal digit is odd.
There is DO input is not linked to any O R gate; the binary output must be all zeroes in such case and all 0's output is also acquired, while all inputs are zeroes. This discrepancy can be resolved through giving one more output to specify the fact as all inputs are not zeroes.
Truth table
Inputs
Outputs
D0
D1
D2
D3
D4
D5
D6
D7
x
y
z
1
0
Logic diagram of octal to binary encoder
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