Revision as of 20:26, 9 February 2016

--D. Thiebaut (talk) 20:13, 9 February 2016 (EST)

Problem 1

Below is a 32-bit binary adder. We have seen it in class. It outputs a+b, where a is represented by a₃₁...a₀, and b by b₃₁...b₀.

Question 1: Using this design as inspiration, design a 32-bit subtraction circuit, that will output a-b, if a and b are the two integers whose bits are shown in the diagram.

Hints: a-b is really a + b's 2's complement.

@@ Line 8: / Line 8: @@
 [[Image:BinaryAdder.png|700px|center]]
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-;;Question 1
+;Question 1
-::: Using this design as inspiration, design a 32-bit subtraction circuit, that will output ''a''-''b'', if ''a'' and ''b'' are the two integers whose bits are shown in the diagram.
+:Using this design as inspiration, design a 32-bit subtraction circuit, that will output ''a''-''b'', if ''a'' and ''b'' are the two integers whose bits are shown in the diagram.
+::''Hints'':  ''a''-''b'' is really ''a'' + ''b'''s 2's complement.
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