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In the above given logic circuit A = 1000 and B = 0011 the output DCBA and Cbcd of the circuit is

WHat is 9's a?

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  • B = $0011$
  • Output of $9$'s complement ckt. = $9$'s complement of $B$ =$ 0110$
  • Input to BCD adder : $1000$ and $0110$
  • BCD adder will add these two numbers and will take care of invalid $BCD$ generation and if needed addition of $6$
  • Final Output : C BCD = $1$ and O/PBCD = $0100$

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