Question
Consider the Adder-Subtractor circuit given in Unit 3 of Block 1. Explain how this circuit will perform subtraction (A-B) if the value of A is 1001 and B is 0111. You must list all the bit values, including Co, Cous, and the overflow condition.
Answer :
Word Count : 145
To perform subtraction (A-B) using the Adder-Subtractor circuit, we first convert the subtraction into an addition problem by taking the two's complement of B. The two's complement of B (0111) is calculated as follows: invert the ___ ________ _____ ____ ______ ______ _____.
________ _____ _____ ____ ___ ____ ________ ___ ____ ___ _____ ________.
___ ____ __________ _______ _______ ___ _________ ________.
_______ ____ ____ ____ _____ ___ ________.
___ ___ ___ ________ ________ _________ __________ _____.
______ ________ ______ _______ _________ ________ ___ ____ ________ _________ ____ ________.
_____ __________ ____ __________ ___ __________.
______ _______ _______ _________ ___ _______ _____ _______ ______ ___ ________.
__________ __________ _______ _____ _______ _________ ___ _____ ________ _________ __________ ________.
____ _____ _______ ________ _________ ___ _______ _____ _______ ______.
__________ ______ ____ ___ _________ _______ ______ ____ __________ _____ _____ ____.
_____ ___ __________ ___.
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To perform subtraction (A-B) using the Adder-Subtractor circuit, we first convert the subtraction into an addition problem by taking the two's complement of B. The two's complement of B (0111) is calculated as follows: invert the ___ ________ _____ ____ ______ ______ _____.
________ _____ _____ ____ ___ ____ ________ ___ ____ ___ _____ ________.
___ ____ __________ _______ _______ ___ _________ ________.
_______ ____ ____ ____ _____ ___ ________.
___ ___ ___ ________ ________ _________ __________ _____.
______ ________ ______ _______ _________ ________ ___ ____ ________ _________ ____ ________.
_____ __________ ____ __________ ___ __________.
______ _______ _______ _________ ___ _______ _____ _______ ______ ___ ________.
__________ __________ _______ _____ _______ _________ ___ _____ ________ _________ __________ ________.
____ _____ _______ ________ _________ ___ _______ _____ _______ ______.
__________ ______ ____ ___ _________ _______ ______ ____ __________ _____ _____ ____.
_____ ___ __________ ___.
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