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MBA IT, Mater in Science and Technology
Devry
Jul-1996 - Jul-2000
Professor
Devry University
Mar-2010 - Oct-2016
I attached the file. please teach me all the details to get answers. I really need those steps to study my exam
Part B. You are designing a Full Subtractor (FS) circuit. The PS has inputs xi, Yi, and a borrow
input bi. There are two outputs: difi‘erence di and borrow-out b 1+1- xn--1"'n1 x111 F8 F8 .d—o The F8 cell should he designed so that the n-bit subtractor network shown above correctly
computes D=X—Y, where X = xlfl . . . x1220 and Y = yml . . . ylyg are nonnegative n-
bit binary numbers. Assume X >= Y. Examples for n=3:
X xlexc. 101 100 -Y - ygylyg - 011 -001
D dgdldg 010 011 1. Draw K-maps for d i and for bi”. Hint: Remember that b i+1 and di are functions of only
the 3 inputs: xi, Yi: b i. Try some examples, and start with the rightmost F8 cell. xiyi XiYi
00 01 11 10 00 01 11 10 0
bi
1 di bi+l 2. Give minimal POS expressions for di and for bi+1. 3. Implement circuit for computing di value using XOR gate(s) only.
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