CSE 110 Laboratory Assignment 2
You may turn in your completed assignment to your lab TA at the end of today’s lab, or
you may hand it in through email by 11:59 PM on Sunday, February 19 (see the course
Web page for the proper email address for your lab section). Be sure to include your
name and lab section information (day and time) on your paper!
In Friday's class, we discussed Boolean logic and how we can combine AND, OR, XOR,
and NOT gates to produce sophisticated circuits. Today's lab will test your
understanding of these concepts by asking you to sketch circuit diagrams for several
simple tasks that are potentially useful for a computer. You will also use a truth table to
analyze a simple circuit.
1. Assume that you have a threebit input that represents a two’s complement number.
You have a fourth input line that always has the value 1. Draw a logic circuit that
returns TRUE if the threebit input represents a negative number in two’s complement
notation, and FALSE otherwise. Be sure to label which of the three bits represents the
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 Spring '08
 SHAUNAKPAWAGI
 Logic, Boolean Algebra, Logic gate, XOR gate, XOR gate returns

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