Lecture 7 - Webstaff.kmutt.ac.th - kmutt
Lecture 7 - Webstaff.kmutt.ac.th - kmutt
Lecture 7 - Webstaff.kmutt.ac.th - kmutt
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Summary2’s ComplementThe 2’s complement of a binary number is found by adding 1 to <strong>th</strong>e LSB of <strong>th</strong>e 1’s complement.Recall <strong>th</strong>at <strong>th</strong>e 1’s complement of 11001010 isTo form <strong>th</strong>e 2’s complement, add 1:1 1 0 0 1 0 1 000110101 (1’s complement)+100110110 (2’s complement)0 0 1 1 0 1 0 1Input bitsAdderOutput bits (sum)0 0 1 1 0 1 1 01Carryin (add 1)Floyd, Digital Fundamentals, 10 <strong>th</strong> ed© 2009 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved
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